种子发育过程中的热应激导致Camelina sativa种子油积累中的生理功能和可塑性受损
Satya Swathi Nadakuduti1,2,3, Larissa C Laforest2, Megan Tachev1
1Environmental Horticulture Department, University of Florida, Gainesville, FL, United States.
Frontiers in plant science
|December 11, 2023
概括
热应激显著降低了卡梅林种子油含量和产量. 这项研究表明,在开花后的高温严重影响了这种重要的油作物的油积和脂肪酸概况.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 生物化学 生物化学
背景情况:
- 甘 (Camelina sativa) 是一种有价值的油作物,用于食品,料和生物燃料.
- 气候变化,特别是热浪,威胁到农作物的生产力.
- 了解热应激对C. sativa的影响对于粮食安全至关重要.
研究的目的:
- 为了评估高温对C. sativa种子发育的影响.
- 描述热应激下的生理,形态和化学变化.
- 量化由于热应激而导致的产量和油含量减少.
主要方法:
- 在C. sativa的解毒后,对C. sativa施加了受控的热应力.
- 物理测量包括透气率和二氧化碳度.
- 在不同发育阶段对种子油和脂肪酸资料进行化学分析.
主要成果:
- 在热应力下,种子油的积累量从406mg/g降至186mg/g.
- 净光合作用受损,透气和内部CO2增加.
- 观察到种子产量 (84.5%),种子重量 (38.5%) 和油含量 (54.1%) 的显著减少.
结论:
- 解热后的热应激严重影响了C. sativa的产量和种子质量.
- 热应激会诱导发育性可塑性,影响脂肪酸的积累.
- 这些发现凸显了C. sativa对气候变化引起的热浪的脆弱性.
相关概念视频
Responses to Heat and Cold Stress
13.5K
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.
13.5K
Adaptations that Reduce Water Loss
25.6K
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.
25.6K
Responses to Salt Stress
13.1K
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.
13.1K
Seed Structure and Early Development of the Sporophyte
28.3K
Seed structures are composed of a protective seed coat surrounding a plant embryo, and a food store for the developing embryo. The embryo contains the precursor tissues for leaves, stem, and roots. The endosperm and cotyledons—seed leaves—act as the food reserves for the growing embryo.
28.3K
C4 Pathway and CAM
45.5K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
45.5K
Responses to Drought and Flooding
10.7K
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.
10.7K


