作为玉米植物在开花阶段的热应激缓解剂
Debora Teixeira Prado1, Anyela Pierina Vega Quispe1, Everton Geraldo de Morais1
1Department of Soil Science, Federal University of Lavras, University Campus, P.O. Box 3037, Lavras 37203-202, Minas Gerais, Brazil.
Plants (Basel, Switzerland)
|March 14, 2026
概括
的应用通过提高光合作用效率和抗氧化系统来减轻玉米的热应激,从而提高了谷物产量. 然而,它并没有减轻热量和水应激的综合效应.
科学领域:
- 植物生理学 植物生理学
- 农业科学 农业科学
背景情况:
- 虽然不是必不可少的,但显示出减轻植物非生物应激的潜力.
- 热应激 (HS) 和水应激 (WS) 对玉米生长产生负面影响,尤其是在开花期间.
- 了解对抗压力耐受性的作用对于作物改善至关重要.
研究的目的:
- 调查在缓解热应激 (HS) 和热水应激 (HS+WS) 在花期玉米中应用的有效性.
主要方法:
- 玉米植物在温室条件下接受了HS和HS + WS.
- 处理涉及叶子或土壤应用.
- 测量包括生理参数 (叶绿素,RWC,Fv:Fm),酶活性 (SOD),透溶液和谷物产量.
主要成果:
- 的应用没有减轻组合的HS + WS.
- 在HS下,叶叶增加了Fv:Fm58%,RWC83%和谷物产量35%.
- 叶子还增加了叶绿素和超氧化物脱酶 (SOD) 的活性,同时降低了HS下可溶性糖和氨基酸.
结论:
- 叶叶的应用有效地通过增强光合作用能力和抗氧化剂防御来减轻玉米的热应激.
- 这些机制有助于维持碳同化和生殖发育,最终在热应激下增加谷物产量.
- 可以改善玉米在开花期间对热应激的抵抗力.
相关概念视频
Responses to Heat and Cold Stress
15.6K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
15.6K
Responses to Drought and Flooding
12.3K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
12.3K
Regulation of Transpiration by Stomata
32.0K
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
32.0K
Responses to Salt Stress
14.9K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
14.9K
Redox Titration: Iodimetry and Iodometry
6.6K
Iodometry and iodimetry are analytical methods used to determine the concentration of oxidizing or reducing agents using iodine. In iodometric titrations, the oxidizing analyte solution is usually acidified and treated with an excess of iodide ions, which generates an equivalent amount of iodine in equilibrium with triiodide. The released iodine is subsequently titrated directly against a standardized reducing agent. As the dilute iodine color becomes pale yellow, a few drops of freshly...
6.6K
Adaptations that Reduce Water Loss
28.5K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
28.5K


