Does root respiration and root anatomical traits affect crop yield under stress? A meta-analysis and experimental study

IF 3.9 2区农林科学 Q1 AGRONOMY Plant and Soil Pub Date : 2024-08-12 DOI:10.1007/s11104-024-06892-4

Pengzhen Du, Jonathan P. Lynch, Zhengli Sun, Feng-Min Li

{"title":"Does root respiration and root anatomical traits affect crop yield under stress? A meta-analysis and experimental study","authors":"Pengzhen Du, Jonathan P. Lynch, Zhengli Sun, Feng-Min Li","doi":"10.1007/s11104-024-06892-4","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Background and aims</h3><p>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.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>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.</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":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plant and Soil","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1007/s11104-024-06892-4","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}

引用次数: 0

Abstract

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).

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

根系呼吸和根系解剖特征会影响胁迫下的作物产量吗？荟萃分析和实验研究

背景和目的功能性状是了解和预测作物对非生物胁迫的反应以及提高产量的基础。根系功能性状是决定碳分配和水分运输效率的关键因素。方法我们进行了全球范围的数据分析，以量化非生物胁迫下根功能性状对产量的生态影响。主要结果关于产量与根系表型之间关系的文献检索与田间结果相当一致。元分析表明，特定根呼吸与胁迫下的产量呈负相关。观察到全根呼吸（RR = 0.823）和木质部面积（RR = 0.912）的临界阈值可提高胁迫下的产量。在胁迫条件下，水导与木质部面积、支柱直径和血管数量呈正相关。结论我们的研究表明，产量与皮层面积和呼吸作用之间存在反比关系。与对照组相比，当胁迫下的全根呼吸量减少不到 17.7% 时，产量增加与全根呼吸量减少有关，皮层组织可能更小。亮点1.特定根呼吸与胁迫下的产量呈负相关。2.全根呼吸与胁迫下的产量呈负相关，超过了最佳值（RR = 0.823）。3.两个地区的产量与根皮层面积呈反比关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Plant and Soil 农林科学-农艺学

CiteScore

8.20

自引率

8.20%

发文量

543

审稿时长

2.5 months

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.