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Cowling CL, Dash L, Kelley DR. Roles of auxin pathways in maize biology. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:6989-6999. [PMID: 37493143 PMCID: PMC10690729 DOI: 10.1093/jxb/erad297] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 07/24/2023] [Indexed: 07/27/2023]
Abstract
Phytohormones play a central role in plant development and environmental responses. Auxin is a classical hormone that is required for organ formation, tissue patterning, and defense responses. Auxin pathways have been extensively studied across numerous land plant lineages, including bryophytes and eudicots. In contrast, our understanding of the roles of auxin in maize morphogenesis and immune responses is limited. Here, we review evidence for auxin-mediated processes in maize and describe promising areas for future research in the auxin field. Several recent transcriptomic and genetic studies have demonstrated that auxin is a key influencer of both vegetative and reproductive development in maize (namely roots, leaves, and kernels). Auxin signaling has been implicated in both maize shoot architecture and immune responses through genetic and molecular analyses of the conserved co-repressor RAMOSA ENHANCER LOCUS2. Polar auxin transport is linked to maize drought responses, root growth, shoot formation, and leaf morphogenesis. Notably, maize has been a key system for delineating auxin biosynthetic pathways and offers many opportunities for future investigations on auxin metabolism. In addition, crosstalk between auxin and other phytohormones has been uncovered through gene expression studies and is important for leaf and root development in maize. Collectively these studies point to auxin as a cornerstone for maize biology that could be leveraged for improved crop resilience and yield.
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Affiliation(s)
- Craig L Cowling
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA 50011, USA
| | - Linkan Dash
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA 50011, USA
| | - Dior R Kelley
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA 50011, USA
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2
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Zhang K, Rengel Z, Zhang F, White PJ, Shen J. Rhizosphere engineering for sustainable crop production: entropy-based insights. TRENDS IN PLANT SCIENCE 2023; 28:390-398. [PMID: 36470795 DOI: 10.1016/j.tplants.2022.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 11/12/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
There is a growing interest in exploring interactions at root-soil interface in natural and agricultural ecosystems, but an entropy-based understanding of these dynamic rhizosphere processes is lacking. We have developed a new conceptual model of rhizosphere regulation by localized nutrient supply using thermodynamic entropy. Increased nutrient-use efficiency is achieved by rhizosphere management based on self-organization and minimized entropy via equilibrium attractors comprising (i) optimized root strategies for nutrient acquisition and (ii) improved information exchange related to root-soil-microbe interactions. The cascading effects through different hierarchical levels amplify the underlying processes in plant-soil system. We propose a strategy for manipulating rhizosphere dynamics and improving nutrient-use efficiency by localized nutrient supply with minimization of entropy to underpin sustainable food/feed/fiber production.
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Affiliation(s)
- Kai Zhang
- Centre for Resources, Environment and Food Security, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions, National Academy of Agriculture Green Development, China Agricultural University, Beijing 100193, China
| | - Zed Rengel
- Soil Science and Plant Nutrition, UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia; Institute for Adriatic Crops and Karst Reclamation, Split 21000, Croatia
| | - Fusuo Zhang
- Centre for Resources, Environment and Food Security, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions, National Academy of Agriculture Green Development, China Agricultural University, Beijing 100193, China
| | - Philip J White
- Ecological Sciences, The James Hutton Institute, Invergowrie, Dundee DD2 5DA, UK
| | - Jianbo Shen
- Centre for Resources, Environment and Food Security, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions, National Academy of Agriculture Green Development, China Agricultural University, Beijing 100193, China.
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3
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Li Y, Yang X, Liu H, Wang W, Wang C, Ding G, Xu F, Wang S, Cai H, Hammond JP, White PJ, Shabala S, Yu M, Shi L. Local and systemic responses conferring acclimation of Brassica napus roots to low phosphorus conditions. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:4753-4777. [PMID: 35511123 DOI: 10.1093/jxb/erac177] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 04/27/2022] [Indexed: 06/14/2023]
Abstract
Due to the non-uniform distribution of inorganic phosphate (Pi) in the soil, plants modify their root architecture to improve acquisition of this nutrient. In this study, a split-root system was employed to assess the nature of local and systemic signals that modulate root architecture of Brassica napus grown with non-uniform Pi availability. Lateral root (LR) growth was regulated systemically by non-uniform Pi distribution, by increasing the second-order LR (2°LR) density in compartments with high Pi supply but decreasing it in compartments with low Pi availability. Transcriptomic profiling identified groups of genes regulated, both locally and systemically, by Pi starvation. The number of systemically induced genes was greater than the number of genes locally induced, and included genes related to abscisic acid (ABA) and jasmonic acid (JA) signalling pathways, reactive oxygen species (ROS) metabolism, sucrose, and starch metabolism. Physiological studies confirmed the involvement of ABA, JA, sugars, and ROS in the systemic Pi starvation response. Our results reveal the mechanistic basis of local and systemic responses of B. napus to Pi starvation and provide new insights into the molecular and physiological basis of root plasticity.
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Affiliation(s)
- Yalin Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Xinyu Yang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - HaiJiang Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Wei Wang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Chuang Wang
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Guangda Ding
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Fangsen Xu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Sheliang Wang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Hongmei Cai
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - John P Hammond
- School of Agriculture, Policy and Development, University of Reading, Reading, UK
| | - Philip J White
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
- The James Hutton Institute, Invergowrie, Dundee, UK
| | - Sergey Shabala
- Tasmanian Institute of Agriculture, College of Science and Engineering, University of Tasmania, Hobart, Tas, Australia
- International Research Center for Environmental Membrane Biology & Department of Horticulture, Foshan University, Foshan, China
| | - Min Yu
- International Research Center for Environmental Membrane Biology & Department of Horticulture, Foshan University, Foshan, China
| | - Lei Shi
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Center/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
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4
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Woods P, Lehner KR, Hein K, Mullen JL, McKay JK. Root Pulling Force Across Drought in Maize Reveals Genotype by Environment Interactions and Candidate Genes. FRONTIERS IN PLANT SCIENCE 2022; 13:883209. [PMID: 35498695 PMCID: PMC9051544 DOI: 10.3389/fpls.2022.883209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
High-throughput, field-based characterization of root systems for hundreds of genotypes in thousands of plots is necessary for breeding and identifying loci underlying variation in root traits and their plasticity. We designed a large-scale sampling of root pulling force, the vertical force required to extract the root system from the soil, in a maize diversity panel under differing irrigation levels for two growing seasons. We then characterized the root system architecture of the extracted root crowns. We found consistent patterns of phenotypic plasticity for root pulling force for a subset of genotypes under differential irrigation, suggesting that root plasticity is predictable. Using genome-wide association analysis, we identified 54 SNPs as statistically significant for six independent root pulling force measurements across two irrigation levels and four developmental timepoints. For every significant GWAS SNP for any trait in any treatment and timepoint we conducted post hoc tests for genotype-by-environment interaction, using a mixed model ANOVA. We found that 8 of the 54 SNPs showed significant GxE. Candidate genes underlying variation in root pulling force included those involved in nutrient transport. Although they are often treated separately, variation in the ability of plant roots to sense and respond to variation in environmental resources including water and nutrients may be linked by the genes and pathways underlying this variation. While functional validation of the identified genes is needed, our results expand the current knowledge of root phenotypic plasticity at the whole plant and gene levels, and further elucidate the complex genetic architecture of maize root systems.
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Affiliation(s)
- Patrick Woods
- Department of Agricultural Biology, Colorado State University, Fort Collins, CO, United States
- Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO, United States
| | - Kevin R. Lehner
- Department of Agricultural Biology, Colorado State University, Fort Collins, CO, United States
| | - Kirsten Hein
- Department of Agricultural Biology, Colorado State University, Fort Collins, CO, United States
- Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO, United States
| | - Jack L. Mullen
- Department of Agricultural Biology, Colorado State University, Fort Collins, CO, United States
| | - John K. McKay
- Department of Agricultural Biology, Colorado State University, Fort Collins, CO, United States
- Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO, United States
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Chin S, Blancaflor EB. Plant Gravitropism: From Mechanistic Insights into Plant Function on Earth to Plants Colonizing Other Worlds. Methods Mol Biol 2022; 2368:1-41. [PMID: 34647245 DOI: 10.1007/978-1-0716-1677-2_1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Gravitropism, the growth of roots and shoots toward or away from the direction of gravity, has been studied for centuries. Such studies have not only led to a better understanding of the gravitropic process itself, but also paved new paths leading to deeper mechanistic insights into a wide range of research areas. These include hormone biology, cell signal transduction, regulation of gene expression, plant evolution, and plant interactions with a variety of environmental stimuli. In addition to contributions to basic knowledge about how plants function, there is accumulating evidence that gravitropism confers adaptive advantages to crops, particularly under marginal agricultural soils. Therefore, gravitropism is emerging as a breeding target for enhancing agricultural productivity. Moreover, research on gravitropism has spawned several studies on plant growth in microgravity that have enabled researchers to uncouple the effects of gravity from other tropisms. Although rapid progress on understanding gravitropism witnessed during the past decade continues to be driven by traditional molecular, physiological, and cell biological tools, these tools have been enriched by technological innovations in next-generation omics platforms and microgravity analog facilities. In this chapter, we review the field of gravitropism by highlighting recent landmark studies that have provided unique insights into this classic research topic while also discussing potential contributions to agriculture on Earth and beyond.
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Affiliation(s)
- Sabrina Chin
- Department of Botany, University of Wisconsin, Madison, WI, USA.
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6
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Zhou X, Muhammad I, Lan H, Xia C. Recent Advances in the Analysis of Cold Tolerance in Maize. FRONTIERS IN PLANT SCIENCE 2022; 13:866034. [PMID: 35498657 PMCID: PMC9039722 DOI: 10.3389/fpls.2022.866034] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 03/21/2022] [Indexed: 05/19/2023]
Abstract
Maize (Zea mays L.) is an annual grass that originated in tropical and subtropical regions of the New World. Maize is highly sensitive to cold stress during seed gemination and the seedling phase, which can lead to reductions in plant vigor and grain production. There are large differences in the morphological and physiological changes caused by cold stress among maize varieties. In general, cold tolerant varieties have a stronger ability to maintain such changes in traits related to seed germination, root phenotypes, and shoot photosynthesis. These morphological and physiological characteristics have been widely used to evaluate the cold tolerance of maize varieties in genetic analyses. In recent years, considerable progress has been made in elucidating the mechanisms of maize in response to cold tolerance. Several QTL, GWAS, and transcriptomic analyses have been conducted on various maize genotypes and populations that show large variations in cold tolerance, resulting in the discovery of hundreds of candidate cold regulation genes. Nevertheless, only a few candidate genes have been functionally characterized. In the present review, we summarize recent progress in molecular, physiological, genetic, and genomic analyses of cold tolerance in maize. We address the advantages of joint analyses that combine multiple genetic and genomic approaches to improve the accuracy of identifying cold regulated genes that can be further used in molecular breeding. We also discuss the involvement of long-distance signaling in plant cold tolerance. These novel insights will provide a better mechanistic understanding of cold tolerance in maize.
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Affiliation(s)
- Xuemei Zhou
- Maize Research Institute, Sichuan Agricultural University, Chengdu, China
| | - Imran Muhammad
- Department of Chemistry, Punjab College of Science, Faisalabad, Pakistan
| | - Hai Lan
- Maize Research Institute, Sichuan Agricultural University, Chengdu, China
- State Key Laboratory of Crop Gene Resource Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, China
- Hai Lan
| | - Chao Xia
- Maize Research Institute, Sichuan Agricultural University, Chengdu, China
- *Correspondence: Chao Xia
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7
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Peng Q, Zhang Z, Su R, Zhang X, Lambers H, He H. Phosphorus and selenium uptake, root morphology, and carboxylates in the rhizosheath of alfalfa (Medicago sativa) as affected by localised phosphate and selenite supply in a split-root system. FUNCTIONAL PLANT BIOLOGY : FPB 2021; 48:1161-1174. [PMID: 34582744 DOI: 10.1071/fp21031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 08/05/2021] [Indexed: 05/12/2023]
Abstract
Low availability of phosphorus (P) is a key limiting factor for the growth of many crops. Selenium (Se) is a nutrient for humans that is acquired predominantly from plants. Localised P and Se supply may affect P- and Se-uptake efficiency. Our aim was to examine the mechanisms of alfalfa (Medicago sativa L.) to acquire P and Se when the elements are heterogeneously or homogeneously distributed in soil, and how P and Se supply affect plant growth and uptake of P and Se. We conducted a split-root experiment growing alfalfa in a loess soil with two distribution patterns (i.e. heterogeneous and homogeneous) of P and Se. The application rates of P (KH2PO4) and Se (Na2SeO3) were 0 and 20mgPkg-1, and 0 and 1mgSekg-1, respectively. Our results showed that plants absorbed more Se when both P and Se were supplied homogeneously than when supplied heterogeneously. Supplying Se had a positive effect on plant P content. Localised P supply resulted in the exudation of more carboxylates by roots than homogeneous P supply did. Soil microbial biomass P was significantly greater when P was supplied homogeneously. Shoot-to-root translocation of Se had a positive effect on P-uptake efficiency. These results indicated that, compared with homogeneous P supply, localised P supply promoted P and Se uptake by increasing the amount of rhizosheath carboxylates and weakening the competition between roots and microbes. Translocation of Se within plant organs was promoted by the application of P, thus enhancing the P-uptake efficiency of alfalfa.
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Affiliation(s)
- Qi Peng
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; and Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China; and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zekun Zhang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; and College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Rui Su
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; and College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xingchang Zhang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; and Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China; and College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hans Lambers
- School of Biological Sciences, The University of Western Australia, Crawley, WA 6009, Australia; and The UWA Institute of Agriculture, The University of Western Australia, Crawley, WA 6009, Australia; and Department of Plant Nutrition, China Agricultural University, Beijing 100193, China
| | - Honghua He
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; and Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China; and College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; and School of Biological Sciences, The University of Western Australia, Crawley, WA 6009, Australia
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Wang L, Li X, Mang M, Ludewig U, Shen J. Heterogeneous nutrient supply promotes maize growth and phosphorus acquisition: additive and compensatory effects of lateral roots and root hairs. ANNALS OF BOTANY 2021; 128:431-440. [PMID: 34309655 PMCID: PMC8414595 DOI: 10.1093/aob/mcab097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 07/25/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND AND AIMS Root proliferation is a response to a heterogeneous nutrient distribution. However, the growth of root hairs in response to heterogeneous nutrients and the relationship between root hairs and lateral roots remain unclear. This study aims to understand the effects of heterogeneous nutrients on root hair growth and the trade-off between root hairs and lateral roots in phosphorus (P) acquisition. METHODS Near-isogenic maize lines, the B73 wild type (WT) and the rth3 root hairless mutant, were grown in rhizoboxes with uniform or localized supply of 40 (low) or 140 (high) mg P kg-1 soil. RESULTS Both WT and rth3 had nearly two-fold greater shoot biomass and P content under local than uniform treatment at low P. Significant root proliferation was observed in both WT and rth3 in the nutrient patch, with the WT accompanied by an obvious increase (from 0.7 to 1.2 mm) in root hair length. The root response ratio of rth3 was greater than that of WT at low P, but could not completely compensate for the loss of root hairs. This suggests that plants enhanced P acquisition through complementarity between lateral roots and root hairs, and thus regulated nutrient foraging and shoot growth. The disappearance of WT and rth3 root response differences at high P indicated that the P application reduced the dependence of the plants on specific root traits to obtain nutrients. CONCLUSIONS In addition to root proliferation, the root response to a nutrient-rich patch was also accompanied by root hair elongation. The genotypes without root hairs increased their investment in lateral roots in a nutrient-rich patch to compensate for the absence of root hairs, suggesting that plants enhanced nutrient acquisition by regulating the trade-off of complementary root traits.
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Affiliation(s)
- Liyang Wang
- Department of Plant Nutrition, College of Resources and Environmental Sciences, Center for Resources, Environment and Food Security, Key Laboratory of Plant-Soil Interactions, Ministry of Education, National Academy of Agriculture Green Development, China Agricultural University, Beijing 100193, PR China
- Department of Nutritional Crop Physiology, Institute of Crop Sciences (340h), University of Hohenheim, Stuttgart 70593, Germany
| | - Xuelian Li
- Department of Nutritional Crop Physiology, Institute of Crop Sciences (340h), University of Hohenheim, Stuttgart 70593, Germany
| | - Melissa Mang
- Department of Nutritional Crop Physiology, Institute of Crop Sciences (340h), University of Hohenheim, Stuttgart 70593, Germany
| | - Uwe Ludewig
- Department of Nutritional Crop Physiology, Institute of Crop Sciences (340h), University of Hohenheim, Stuttgart 70593, Germany
| | - Jianbo Shen
- Department of Plant Nutrition, College of Resources and Environmental Sciences, Center for Resources, Environment and Food Security, Key Laboratory of Plant-Soil Interactions, Ministry of Education, National Academy of Agriculture Green Development, China Agricultural University, Beijing 100193, PR China
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9
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Liu D. Root developmental responses to phosphorus nutrition. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2021; 63:1065-1090. [PMID: 33710755 DOI: 10.1111/jipb.13090] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 03/07/2021] [Indexed: 05/25/2023]
Abstract
Phosphorus is an essential macronutrient for plant growth and development. Root system architecture (RSA) affects a plant's ability to obtain phosphate, the major form of phosphorus that plants uptake. In this review, I first consider the relationship between RSA and plant phosphorus-acquisition efficiency, describe how external phosphorus conditions both induce and impose changes in the RSA of major crops and of the model plant Arabidopsis, and discuss whether shoot phosphorus status affects RSA and whether there is a universal root developmental response across all plant species. I then summarize the current understanding of the molecular mechanisms governing root developmental responses to phosphorus deficiency. I also explore the possible reasons for the inconsistent results reported by different research groups and comment on the relevance of some studies performed under laboratory conditions to what occurs in natural environments.
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Affiliation(s)
- Dong Liu
- MOE Key Laboratory of Bioinformatics, School of Life Sciences, Center for Plant Biology, Tsinghua University, Beijing, 100084, China
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10
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Jin K, Li H, Li X, Li H, Dodd IC, Belimov AA, Davies WJ, Shen J. Rhizosphere bacteria containing ACC deaminase decrease root ethylene emission and improve maize root growth with localized nutrient supply. Food Energy Secur 2021. [DOI: 10.1002/fes3.278] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Kemo Jin
- National Academy of Agriculture Green Development Department of Plant Nutrition College of Resource and Environmental SciencesChina Agricultural University Beijing China
| | - Hongbo Li
- Institute of Environment and Sustainable Development in AgricultureChinese Academy of Agricultural Sciences Beijing China
| | - Xiaoqing Li
- The Lancaster Environment Centre Lancaster University Lancashire UK
| | - Haigang Li
- National Academy of Agriculture Green Development Department of Plant Nutrition College of Resource and Environmental SciencesChina Agricultural University Beijing China
| | - Ian C. Dodd
- The Lancaster Environment Centre Lancaster University Lancashire UK
| | - Andrey A. Belimov
- All‐Russia Research Institute for Agricultural Microbiology St. Petersburg Russian Federation
| | | | - Jianbo Shen
- National Academy of Agriculture Green Development Department of Plant Nutrition College of Resource and Environmental SciencesChina Agricultural University Beijing China
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11
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Wang X, Shen J, Hedden P, Phillips AL, Thomas SG, Ge Y, Ashton RW, Whalley WR. Wheat growth responses to soil mechanical impedance are dependent on phosphorus supply. SOIL & TILLAGE RESEARCH 2021; 205:104754. [PMID: 33390631 PMCID: PMC7729824 DOI: 10.1016/j.still.2020.104754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 07/08/2020] [Accepted: 07/21/2020] [Indexed: 06/12/2023]
Abstract
Increased mechanical impedance induced by soil drying or compaction causes reduction in plant growth and crop yield. However, how mechanical impedance interacts with nutrient stress has been largely unknown. Here, we investigated the effect of mechanical impedance on the growth of wheat seedlings under contrasting phosphorus (P) supply in a sand culture system which allows the mechanical impedance to be independent of water and nutrient availability. Two wheat genotypes containing the Rht-B1a (tall) or Rht-B1c (gibberellin-insensitive dwarf) alleles in the Cadenza background were used and their shoot and root traits were determined. Mechanical impedance caused a significant reduction in plant growth under sufficient P supply, including reduced shoot and root biomass, leaf area and total root length. By contrast, under low P supply, mechanical impedance did not affect biomass, tiller number, leaf length, and nodal root number in both wheat genotypes, indicating that the magnitude of the growth restriction imposed by mechanical impedance was dependent on P supply. The interaction effect between mechanical impedance and P level was significant on most plant traits except for axial and lateral root length, suggesting an evident physical and nutritional interaction. Our findings provide valuable insights into the integrated effects of plants in response to both soil physical and nutritional stresses. Understanding the response patterns is critical for optimizing soil tillage and nutrient management in the field.
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Affiliation(s)
- Xin Wang
- Department of Plant Nutrition, College of Resources and Environmental Sciences, Key Laboratory of Plant-Soil Interactions, MoE, National Academy of Agriculture Green Development, China Agricultural University, Beijing, 100193, PR China
- Rothamsted Research, West Common, Harpenden, AL5 2JQ, UK
| | - Jianbo Shen
- Department of Plant Nutrition, College of Resources and Environmental Sciences, Key Laboratory of Plant-Soil Interactions, MoE, National Academy of Agriculture Green Development, China Agricultural University, Beijing, 100193, PR China
| | - Peter Hedden
- Rothamsted Research, West Common, Harpenden, AL5 2JQ, UK
- Laboratory of Growth Regulators, Czech Academy of Sciences, Institute of Experimental Botany & Palacký University, Šlechtitelů 27, CZ-78371 Olomouc, Czech Republic
| | | | | | - Yaoxiang Ge
- Rothamsted Research, West Common, Harpenden, AL5 2JQ, UK
- College of Biology and Pharmacy, Yulin Normal University, Yulin, 537000, PR China
| | - Rhys W. Ashton
- Rothamsted Research, West Common, Harpenden, AL5 2JQ, UK
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Wang X, Whalley WR, Miller AJ, White PJ, Zhang F, Shen J. Sustainable Cropping Requires Adaptation to a Heterogeneous Rhizosphere. TRENDS IN PLANT SCIENCE 2020; 25:1194-1202. [PMID: 32830043 DOI: 10.1016/j.tplants.2020.07.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/02/2020] [Accepted: 07/09/2020] [Indexed: 05/19/2023]
Abstract
Root-soil interactions in the rhizosphere are central to resource acquisition and crop production in agricultural systems. However, apart from studies in idealized experimental systems, rhizosphere processes in real agricultural soils in situ are largely uncharacterized. This limits the contribution of rhizosphere science to agriculture and the ongoing Green Revolution. Here, we argue that understanding plant responses to soil heterogeneity is key to understanding rhizosphere processes. We highlight rhizosphere sensing and root-induced soil modification in the context of heterogeneous soil structure, resource distribution, and root-soil interactions. A deeper understanding of the integrated and dynamic root-soil interactions in the heterogeneously structured rhizosphere could increase crop production and resource use efficiency towards sustainable agriculture.
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Affiliation(s)
- Xin Wang
- Department of Plant Nutrition, College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, China Agricultural University, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, PR China
| | | | | | - Philip J White
- Ecological Science Group, The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Distinguished Scientist Fellowship Program, King Saud University, Riyadh 11451, Saudi Arabia
| | - Fusuo Zhang
- Department of Plant Nutrition, College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, China Agricultural University, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, PR China
| | - Jianbo Shen
- Department of Plant Nutrition, College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, China Agricultural University, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, PR China.
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