Pengzhen Du, Jonathan P. Lynch, Zhengli Sun, Feng-Min Li
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A field study was also conducted to test the relationships between yield and root anatomical traits such as cortex area and xylem area in two semi-arid regions in China.</p><h3 data-test=\"abstract-sub-heading\">Key results</h3><p>The search of literature on the relationships between yield and root phenotypes was fairly consistent with the results in the field. Meta-analysis showed specific root respiration was negatively related to yield under stress. Critical thresholds of whole root respiration (RR = 0.823) and xylem area (RR = 0.912) were observed for better yield under stress. Hydraulic conductance was positively correlated with xylem area, stele diameter and vessel number under stress. In the field study, there were inverse relationships between yield and cortex area and xylem area was positively related to wheat yield at both sites.</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>Our study suggests that there are inverse relationships between yield and cortex area and respiration. Increased yield was associated with decreased whole root respiration with potentially smaller cortical tissue when whole respiration under stress was reduced by less than 17.7% compared with the control. However, increased xylem area contributed to high yields at both sites under rain-fed conditions.</p><h3 data-test=\"abstract-sub-heading\">Highlights</h3>\n<ol>\n<li>\n<span>1.</span>\n<p>Specific root respiration was negatively related to yield under stress.</p>\n</li>\n<li>\n<span>2.</span>\n<p>Whole root respiration was negatively related to yield under stress beyond an optimal value (RR = 0.823).</p>\n</li>\n<li>\n<span>3.</span>\n<p>There were inverse relationships between yield and root cortical area in two regions.</p>\n</li>\n<li>\n<span>4.</span>\n<p>A critical threshold of xylem area was observed for yield under stress (RR = 0.912).</p>\n</li>\n</ol>","PeriodicalId":20223,"journal":{"name":"Plant and Soil","volume":null,"pages":null},"PeriodicalIF":3.9000,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Does root respiration and root anatomical traits affect crop yield under stress? 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A field study was also conducted to test the relationships between yield and root anatomical traits such as cortex area and xylem area in two semi-arid regions in China.</p><h3 data-test=\\\"abstract-sub-heading\\\">Key results</h3><p>The search of literature on the relationships between yield and root phenotypes was fairly consistent with the results in the field. Meta-analysis showed specific root respiration was negatively related to yield under stress. Critical thresholds of whole root respiration (RR = 0.823) and xylem area (RR = 0.912) were observed for better yield under stress. Hydraulic conductance was positively correlated with xylem area, stele diameter and vessel number under stress. 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Does root respiration and root anatomical traits affect crop yield under stress? A meta-analysis and experimental study
Background and aims
Functional traits are fundamental for understanding and predicting crop responses to abiotic stress and yield improvement. Root functional traits are key determinants of carbon allocation and water transport efficiency. However, there are few studies integrating the effects of physiological and anatomical phenotypes in roots on yield.
Methods
We performed a global scale data analysis to quantify the ecological effects of root functional traits on yield under abiotic stress. A field study was also conducted to test the relationships between yield and root anatomical traits such as cortex area and xylem area in two semi-arid regions in China.
Key results
The search of literature on the relationships between yield and root phenotypes was fairly consistent with the results in the field. Meta-analysis showed specific root respiration was negatively related to yield under stress. Critical thresholds of whole root respiration (RR = 0.823) and xylem area (RR = 0.912) were observed for better yield under stress. Hydraulic conductance was positively correlated with xylem area, stele diameter and vessel number under stress. In the field study, there were inverse relationships between yield and cortex area and xylem area was positively related to wheat yield at both sites.
Conclusions
Our study suggests that there are inverse relationships between yield and cortex area and respiration. Increased yield was associated with decreased whole root respiration with potentially smaller cortical tissue when whole respiration under stress was reduced by less than 17.7% compared with the control. However, increased xylem area contributed to high yields at both sites under rain-fed conditions.
Highlights
1.
Specific root respiration was negatively related to yield under stress.
2.
Whole root respiration was negatively related to yield under stress beyond an optimal value (RR = 0.823).
3.
There were inverse relationships between yield and root cortical area in two regions.
4.
A critical threshold of xylem area was observed for yield under stress (RR = 0.912).
期刊介绍：
Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.
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