Rice yield and quality in response to daytime and nighttime temperature increase – A meta-analysis perspective
Rice yield and quality in response to daytime and nighttime temperature increase – A meta-analysis perspective
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白天和夜间温度升高对水稻产量和品质的影响 — 荟萃分析视角
DOI：
10.1016/j.scitotenv.2023.165256
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发表时间：
2023
影响因子：
9.8
通讯作者：
Karthikeyan, R.
中科院分区：
文献类型：
--
作者：
Su, Qiong;Rohila, Jai S.;Ranganathan, Shyam;Karthikeyan, R.
在种植季节增加的热胁迫对水稻生产提出了重大挑战，但水稻籽粒产量，品质和高白天，夜间温度之间的复杂化学计量仍然是目前的知识空白。我们使用已发表文献中1105个白天温度实验和841个夜间温度实验的组合数据集进行了荟萃分析，以研究白天高温（HDT）和夜间高温（HNT）对水稻产量及其各个组成部分的影响（如穗数、每穗小穗数、结实率、粒重）和籽粒品质性状（如出粉量、垩白度、直链淀粉和蛋白质含量）。本研究建立了水稻产量及其构成因素和稻米品质与HDT/HNT的关系，并研究了性状对HDT和HNT的表型可塑性。结果表明，HNT对水稻产量和品质的影响比HDT更为不利。最佳水稻产量的最佳白天和夜间温度分别约为28 °C和22 °C。当超过最适温度时，HNT和HDT每增加1 °C，籽粒产量分别下降7%和6%。结实率（即，育性）是对HDT和HNT最敏感的性状，并占产量损失的大部分。高温高压处理和高温高压处理均通过增加垩白度和降低整精米率影响稻米品质，从而影响稻米的商品性。此外，发现HNT显著影响营养质量（例如，蛋白质含量）。我们的研究结果填补了目前的知识空白，估计水稻产量损失和高温下可能的经济后果，并建议对稻米品质的影响也应考虑到选择和育种的耐高温水稻品种，以应对HDT和HNT。
Increased heat stress during cropping season poses significant challenges to rice production, yet the complex stoichiometry between rice grain yield, quality and high daytime, nighttime temperature remains with gaps in current knowledge. We conducted a meta-analysis using a combined dataset of 1105 experiments for daytime temperature and 841 experiments for nighttime temperature from published literature to investigate the effects of high daytime temperature (HDT) and high nighttime temperatures (HNT) on rice yield and its various components (such as panicle number, spikelet number per panicle, seed set rate, grain weight) and grain quality traits (such as milling yield, chalkiness, amylose and protein contents). We established relationships between rice yield, its components, grain quality and the HDT/HNT, and studied phenotypic plasticity of the traits in response to HDT and HNT. Results showed that HNT had a more detrimental impact on rice yield and quality when compared with the HDT. The optimum daytime and nighttime temperatures for best rice yield were approximately 28 °C and 22 °C, respectively. Grain yield showed a decline by 7% and 6% for each 1 °C increase in HNT and HDT, respectively, when exceeded the optimum temperatures. Seed set rate (i.e., percent fertility) was the most sensitive trait to HDT and HNT and accounted for most of the yield losses. Both the HDT and HNT affected grain quality by increasing chalkiness and decreasing head rice percentage, which may affect marketability of the rice produced. Additionally, HNT was found to significantly impact nutritional quality (e.g., protein content) of rice grains. Our findings fill current knowledge gaps on estimations of rice yield losses and possible economic consequences under high temperatures and suggest that impacts on rice quality should also be considered for selection and breeding of high-temperature tolerant rice varieties in response to HDT and HNT.