叶绿体大小是光合作用效率的最佳吗?
Katarzyna Głowacka1,2,3, Johannes Kromdijk1,4, Coralie E Salesse-Smith1
1Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 West Gregory Drive, Urbana, IL, 61801, USA.
The New phytologist
|June 25, 2023
概括
操纵烟草植物的叶绿体大小并没有提高光合作用效率或作物产量. 扩大的叶绿体表现不佳,而较小的叶绿体对野生类型没有任何优势,表明这种方法不太可能促进生长.
科学领域:
- 植物生物学 植物生物学
- 光合作用研究研究 光合作用研究
- 农作物科学 农作物科学
背景情况:
- 提高光合作用效率是可持续作物生产的关键.
- 叶绿体大小是影响光合作用效率的潜在因素.
研究的目的:
- 调查是否操纵叶绿体大小可以提高光合作用性能和作物生产率.
- 评估改变的叶绿体大小对烟草生理特征和现场表现的影响.
主要方法:
- 产生的烟草 (Nicotiana tabacum) 通过修改叶绿体分裂基因,具有不同叶绿体大小的线条.
- 在稳定状态和波动光条件下评估光合作用性能.
- 进行了实地试验,以测量作物生产率.
主要成果:
- 在大多数测量特征中,化物扩大的线条表现出较低的性能.
- 拥有较小,较多的叶绿体的菌株表现出与野生型 (WT) 相比的光合作用效率.
- 增加的叶绿体大小减少了美索菲尔导电性 (gm) 和增强了非光化学火,而大小的减少并没有改善gm.
结论:
- 叶绿体尺寸操纵对光吸收和叶子光谱的影响很小.
- 改变叶绿体大小不太可能是提高光合作用效率或作物生长的可行策略.
- 无论是扩大的还是缩小的叶绿体大小,都没有在田间生产力方面比WT提供显著的优势.
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