Distinguishing High Daytime From Nighttime Temperature Effects During Early Vegetative Growth in Cotton

IF 3.7 2区 农林科学 Q1 AGRONOMY Journal of Agronomy and Crop Science Pub Date : 2024-09-16 DOI:10.1111/jac.12757
Ved Parkash, John Snider, Kelvin Jimmy Awori, Jhansy Reddy Katta, Cristiane Pilon, Viktor Tishchenko
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Abstract

High-temperature limits early season vegetative growth of cotton, and the physiological response of cotton (Gossypium hirsutum L.) to high daytime or nighttime temperature needs to be explored. The objectives of the current study were to determine (1) plant growth response, (2) physiological contributors to variation in biomass production and (3) mechanisms driving variation in net photosynthetic rate (AN) in response to different combinations of high daytime and nighttime temperatures. Beginning at planting, cotton was exposed to four different growth temperature regimes: (1) optimum (30/20°C day/night), (2) high nighttime (30/30°C), (3) high daytime (40/20°C) and combined high daytime and nighttime (40/30°C) for 4 weeks. Relative to the 30/20°C treatment, plant growth was positively affected by high nighttime temperature and negatively affected by high daytime temperature and combined high day and night temperature. Increased leaf area mainly contributed to increased biomass production in high nighttime temperature; higher nighttime respiration (RN) drove reductions in biomass in combined high daytime and nighttime temperature; and decreased leaf area and AN and increased RN drove reductions in biomass under high daytime temperature alone. AN was not impacted by high nighttime temperature, while decreased under high daytime temperature and increased with combined high daytime and nighttime temperature. Adjustments in leaf traits contributed to increases in AN in combined high daytime and nighttime temperature, and increased photorespiration and respiration contributed to reductions in AN under high daytime temperature. Overall, early season vegetative growth of cotton exhibited differential responses to high daytime and nighttime temperatures.

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区分棉花早期植株生长过程中白天高温和夜间温度的影响
高温限制了棉花早期的无性生长,因此需要探索棉花(Gossypium hirsutum L.)对白天或夜间高温的生理反应。本研究的目的是确定:(1)植物生长反应;(2)生物量产生变化的生理因素;(3)昼夜高温不同组合下净光合速率(AN)变化的驱动机制。从播种开始,棉花暴露在四种不同的生长温度条件下:(1) 最适温度(30/20°C 昼夜温差),(2) 夜间高温(30/30°C),(3) 白天高温(40/20°C)和昼夜高温组合(40/30°C),持续四周。与 30/20°C 处理相比,植物生长受到夜间高温的积极影响,而受到白天高温和昼夜联合高温的消极影响。在夜间高温条件下,叶面积增加是生物量增加的主要原因;在昼夜温差较大的情况下,夜间呼吸量(RN)增加导致生物量减少;在白天高温条件下,叶面积和 AN 减少以及 RN 增加导致生物量减少。AN 不受夜间高温的影响,但在白天高温下会减少,在白天和夜间高温共同作用下会增加。叶片性状的调整导致了昼夜温差大时 AN 的增加,而光呼吸和呼吸作用的增加导致了昼夜温差大时 AN 的减少。总体而言,棉花早季无性生长对白天和夜间高温的反应各不相同。
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来源期刊
Journal of Agronomy and Crop Science
Journal of Agronomy and Crop Science 农林科学-农艺学
CiteScore
8.20
自引率
5.70%
发文量
54
审稿时长
7.8 months
期刊介绍: The effects of stress on crop production of agricultural cultivated plants will grow to paramount importance in the 21st century, and the Journal of Agronomy and Crop Science aims to assist in understanding these challenges. In this context, stress refers to extreme conditions under which crops and forages grow. The journal publishes original papers and reviews on the general and special science of abiotic plant stress. Specific topics include: drought, including water-use efficiency, such as salinity, alkaline and acidic stress, extreme temperatures since heat, cold and chilling stress limit the cultivation of crops, flooding and oxidative stress, and means of restricting them. Special attention is on research which have the topic of narrowing the yield gap. The Journal will give preference to field research and studies on plant stress highlighting these subsections. Particular regard is given to application-oriented basic research and applied research. The application of the scientific principles of agricultural crop experimentation is an essential prerequisite for the publication. Studies based on field experiments must show that they have been repeated (at least three times) on the same organism or have been conducted on several different varieties.
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