在不同的光强度下,光合作用的改善与棉花的化阶段密切相关
Zhangying Lei1,2, Mengmeng Jia1, Heng Wang3
1Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Corps, Shihezi University, Shihezi, 832003, P.R. China.
The Plant journal : for cell and molecular biology
|November 3, 2024
概括
农作物化改善了光合作用,早期阶段提高了高光速率,后期阶段提高了低光光合作用. 这种渐进的过程增加了作物生物质和叶面积.
科学领域:
- 植物生物学 植物生物学
- 农作物科学 农作物科学
- 光合作用研究研究 光合作用研究
背景情况:
- 通过增强光合作用蓄积,化显著增加了作物大小和生物量.
- 关于化对光合作用率的影响的经验数据在光强度和叶子解剖学上仍然有限.
- 了解光合作用和地表生物质之间的关系对于作物改善至关重要.
研究的目的:
- 为了研究棉花化对光合作用率的影响,在不同的光强度下.
- 分析叶子解剖学的变化及其与光合作用和生物质积累的相关性.
- 确定不同化阶段如何影响光合作用效率和作物产量.
主要方法:
- 在高 (2000),中等 (1000) 和低 (400 μmol m-2 sec-1) 光强度下测量了光合作用速率.
- 评估了黑暗呼吸,相对叶绿素含量 (SPAD),叶形态 (叶面积,LMA) 和地表生物质.
- 在两个生长季节 (2018-2019) 评估了40种野生,91种半野生和42种化的棉花基因型.
主要成果:
- 第一个化阶段 (从野生到半野生) 增加了高光光合作用率,SPAD,叶面积 (LA),并减少了每单位面积 (LMA) 的叶质量,从而增加了生物质.
- 第二个化阶段 (半野生到化) 增强了低光照相和减少LMA,也与生物质增加相关.
- 光合作用的改善是特定于光强度的,并且在化阶段有所不同.
结论:
- 在化过程中增强光合作用是一种逐渐的,特定阶段的过程.
- 早期的化促进了高光光合作用,而后来的阶段提高了低光效率.
- 这些适应,包括增加LA和树冠扩张,有助于在化作物中增加生物质积累.
相关概念视频
Light Acquisition
8.4K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.4K
Photoreceptors and Plant Responses to Light
20.2K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
20.2K
The Calvin Benson Cycle
4.4K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
4.4K
Biological Clocks and Seasonal Responses
34.6K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
34.6K
The Antenna Complex
5.9K
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency...
5.9K
Plant Breeding and Biotechnology
18.8K
Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.
18.8K


