Whole Irradiated Plant Leaves Showed Faster Photosynthetic Induction Than Individually Irradiated Leaves via Improved Stomatal Opening
Whole Irradiated Plant Leaves Showed Faster Photosynthetic Induction Than Individually Irradiated Leaves via Improved Stomatal Opening
复制标题
DOI：
10.3389/fpls.2019.01512
复制
发表时间：
2019-11-28
影响因子：
5.6
通讯作者：
Yamori, Wataru
中科院分区：
文献类型：
--
作者：
Shimadzu, Shunji;Seo, Mitsunori;Yamori, Wataru
快速光合诱导对于作物冠层和林下植物在波动光照条件下的生长至关重要。以往的研究大多集中在单个叶片的光合诱导反应，而没有考虑到整个植物的系统反应。然而，在自然环境中，单个叶子和整个植物都暴露在阳光下，因为即使在给定的植物内，光环境也不均匀。在本研究中，我们研究了是否有任何差异的光合诱导响应的叶片的整个照射植物和单独照射的叶在拟南芥光合诱导作为整个植物的反应。我们使用了两种方法，光合作用的可视化和直接测量的气体交换和叶绿素荧光，以证明整个照射植物促进其光合诱导通过改善气孔开放相比，单独照射叶片。此外，使用两个拟南芥脱落酸转运蛋白基因敲除突变体，abcg25和abcg40，本研究表明，脱落酸可能参与气孔开放的这种系统性反应，使植物在动态光环境中以最小的成本优化利用光能。
Rapid photosynthetic induction is crucial for plants under fluctuating light conditions in a crop canopy as well as in an understory. Most previous studies have focused on photosynthetic induction responses in a single leaf, whereas the systemic responses of the whole plant have not been considered. In a natural environment, however, both single leaves and whole plants are exposed to sunlight, since the light environment is not uniform even within a given plant. In the present study, we examined whether there is any difference between the photosynthetic induction response of a leaf of a whole irradiated plant and an individually irradiated leaf in Arabidopsis thaliana to consider photosynthetic induction as the response of a whole plant. We used two methods, the visualization of photosynthesis and direct measurements of gas-exchange and Chl fluorescence, to demonstrate that whole irradiated plant promoted its photosynthetic induction via improved stomatal opening compared with individually irradiated leaf. Furthermore, using two Arabidopsis knockout mutants of abscisic acid transporter, abcg25 and abcg40, the present study suggests that abscisic acid could be involved in this systemic response for stomatal opening, allowing plants to optimize the use of light energy at minimal cost in plants in a dynamic light environment.