Effects of Drought Stress at the Booting Stage on Leaf Physiological Characteristics and Yield of Rice DOI Creative Commons

Xiaolong Yang,

Xiuxiu Wang, Yang Li

et al.

Plants, Journal Year: 2024, Volume and Issue: 13(24), P. 3464 - 3464

Published: Dec. 11, 2024

Drought stress is a major environmental constraint that limits rice (Oryza sativa L.) production worldwide. In this study, we investigated the effects of drought at booting stage on leaf physiological characteristics and yield. The results showed would lead to significant decrease in chlorophyll content photosynthesis leaves, which affect Three different varieties were used namely Hanyou73 (HY73), Huanghuazhan (HHZ), IRAT109. Under stress, all cultivars decreased significantly: 11.1% 32.2% decreases b HHZ cultivars, 14.1% 28.5% IRAT109 22.9% 18.6% HY73 respectively. addition, also led water potential, increase antioxidant enzyme activity, an malondialdehyde (MDA) content, suggesting activated defense mechanism cope with drought-induced oxidative stress. This study found significantly reduced net photosynthetic rate stomatal conductance rice, which, turn, affected yield rice. most significantly, reaching 30.2%, while yields by 13.0% 18.2%, analysis composition number grains per panicle, seed-setting rate, 1000-grain weight key factors affecting formation. A correlation there was positive between conductance, chla/chlb ratio, Rubisco Fv/Fm, but negative MDA non-photochemical quenching (NPQ). summary, are multifaceted, involving changes multiple agronomic traits. highlight importance selecting nurturing high tolerance, should have efficient systems efficiency. Future research focus genetic mechanisms these responses order develop molecular markers assist breeding drought-tolerant varieties.

Language: Английский

A Regional Water and Soil Resource Spatial Coordination and Optimization Method Considering Crop Suitability and Drought-Induced Yield Reduction Effects DOI

Kaihua Cao,

Xiao Liu, Yijia Wang

et al.

Published: Jan. 1, 2025

This study proposes a new spatial multi-objective collaborative optimization method for water and soil resources, coupling regional crop suitability drought effects. The aims to optimize the grid of resources balance trade-off between economic benefits blue resource utilization, while mitigating adverse impacts on agricultural production. constructs multi-scale evaluation index (MSDEI) quantitatively characterize interrelationship yield reduction, integrates with cellular automaton model. It also develops grid-based planning model that balances utilization efficiency, enabling fine-tuned resources. Application results in Sanjiang Plain, major grain-producing region China, demonstrate proposed collaboratively optimized adjusted distribution across approximately 4.5 million 100m × cells. cropping structure improved suitability, productivity rice, maize, soybeans increasing by 18.3%, 16.9%, 8.8%, respectively. significantly enhanced coordination efficiency yield. (2) Fully considering heterogeneity growth characteristics requirements, irrigation strategy demonstrates trend "low early stage, high mid-stage, reduced late stage." altered use surface groundwater, proportion groundwater shifting from 63% 37% 72% 28%, current situation over-extraction Plain; (3) In years, considers drought-induced reduction effects reduces risk caused drought-related loss 14% compared traditional models through refined optimization. validate applicability under conditions, providing scientific basis fine management sustainable development

Language: Английский

Citations

0
Analysis of the spatiotemporal evolution pattern of the synergistic relationship among high temperature, drought, and CHTDs in climate transition zones DOI

Hui Su,

Chunxiao Wu, Shuai Zhou

et al.

Journal of Hydrology Regional Studies, Journal Year: 2025, Volume and Issue: 59, P. 102312 - 102312

Published: March 15, 2025

Language: Английский

Citations

0
Anthropogenic Influence on the Compound Hot and Dry Event in Summer 2022 in the Tibetan Plateau Based on Statistical Downscaling CMIP6 Models DOI

Kening Xue,

Wei Li,

Siyan Dong

et al.

International Journal of Climatology, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

ABSTRACT In the summer of 2022, Tibetan Plateau experienced a record‐breaking compound hot and dry event (CHDE). This study quantifies contribution anthropogenic influence to this using set high‐resolution statistical downscaling results from six CMIP6 models. The Copula function was used calculate joint probability event. show that in conditions broke records since 1961, with return period 408 years. were also uncommon, 47 is particularly rare, more than 20,000 Based on models, it found has increased risks similar those 2022 by factors 3.3 [1.5, 5.2] 14 [8.6, 21.2], respectively. Additionally, risk events been factor 46.7 [26.7, 77.6]. future, intensification warm‐wet situations Plateau, are expected increase remarkably, occurrence rising 56 [34, 108] 75 [44, 162] during periods 2021–2040 2051–2070, Conversely, projected decrease, reductions 0.21 [0.075, 0.46] 0.51 [0.3, 1.2] times two future periods. However, increase, increases 11 [6, 25] first use downscaled simulation conduct attribution analysis for which can deepen understanding human activities events.

Language: Английский

Citations

0
Hazard assessment of compound drought and heat events on summer maize from agricultural and meteorological perspectives DOI Creative Commons
Qing Li, Peijuan Wang, Yang Li

et al.

Agricultural Water Management, Journal Year: 2025, Volume and Issue: 313, P. 109479 - 109479

Published: April 19, 2025

Language: Английский

Citations

0
Effects of Drought Stress at the Booting Stage on Leaf Physiological Characteristics and Yield of Rice DOI Creative Commons

Xiaolong Yang,

Xiuxiu Wang, Yang Li

et al.

Plants, Journal Year: 2024, Volume and Issue: 13(24), P. 3464 - 3464

Published: Dec. 11, 2024

Drought stress is a major environmental constraint that limits rice (Oryza sativa L.) production worldwide. In this study, we investigated the effects of drought at booting stage on leaf physiological characteristics and yield. The results showed would lead to significant decrease in chlorophyll content photosynthesis leaves, which affect Three different varieties were used namely Hanyou73 (HY73), Huanghuazhan (HHZ), IRAT109. Under stress, all cultivars decreased significantly: 11.1% 32.2% decreases b HHZ cultivars, 14.1% 28.5% IRAT109 22.9% 18.6% HY73 respectively. addition, also led water potential, increase antioxidant enzyme activity, an malondialdehyde (MDA) content, suggesting activated defense mechanism cope with drought-induced oxidative stress. This study found significantly reduced net photosynthetic rate stomatal conductance rice, which, turn, affected yield rice. most significantly, reaching 30.2%, while yields by 13.0% 18.2%, analysis composition number grains per panicle, seed-setting rate, 1000-grain weight key factors affecting formation. A correlation there was positive between conductance, chla/chlb ratio, Rubisco Fv/Fm, but negative MDA non-photochemical quenching (NPQ). summary, are multifaceted, involving changes multiple agronomic traits. highlight importance selecting nurturing high tolerance, should have efficient systems efficiency. Future research focus genetic mechanisms these responses order develop molecular markers assist breeding drought-tolerant varieties.

Language: Английский

Citations

0