Photoperiod controls plant seed size in a CONSTANS-dependent manner
Photoperiod controls plant seed size in a CONSTANS-dependent manner
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光周期以常量依赖性方式控制植物种子大小
DOI：
10.1038/s41477-023-01350-y
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发表时间：
2023-02
期刊：
影响因子：
18
通讯作者：
Yilong Hu
中科院分区：
文献类型：
--
作者：
Bin Yu;Xuemei He;Yang Tang;Zhonghui Chen;Limeng Zhou;Xiaoming Li;Chunyu Zhang;Xiang Huang;Yuhua Yang;Wenbin Zhang;Fanjiang Kong;Yansong Miao;Xingliang Hou;Yilong Hu
光周期植物感知日长的变化作为季节性线索，以协调其营养和生殖生长。虽然已知光周期敏感植物的花转变受日照长度的严格控制，但光周期如何影响其花后发育仍有待明确定义，其潜在机制也是如此。在这里，我们证明了光周期在种子发育中起着重要作用。我们发现，长日照（LD）和短日照（SD）植物产生较大的种子LD和SD条件下，分别，然而，种子大小保持不变时，CONSTANS（CO），光周期反应途径的中央调控基因，在拟南芥和大豆突变。我们进一步发现，CO直接抑制转录的AP 2（一个已知的调节基因的种子发育）在LD条件下在拟南芥和SD条件下在大豆，从而控制种子大小的光周期依赖性的方式，这些影响是通过调节种皮表皮细胞的增殖。总的来说，我们的研究结果揭示了一个涉及CO-AP 2的关键调控级联调节植物中光周期介导的种子发育，并为具有不同光周期反应类型的植物如何感知季节变化提供了新的见解，使它们能够优化其生殖生长。
Photoperiodic plants perceive changes in day length as seasonal cues to orchestrate their vegetative and reproductive growth. Although it is known that the floral transition of photoperiod-sensitive plants is tightly controlled by day length, how photoperiod affects their post-flowering development remains to be clearly defined, as do the underlying mechanisms. Here we demonstrate that photoperiod plays a prominent role in seed development. We found that long-day (LD) and short-day (SD) plants produce larger seeds under LD and SD conditions, respectively; however, seed size remains unchanged when CONSTANS (CO), the central regulatory gene of the photoperiodic response pathway, is mutated in Arabidopsis and soybean. We further found that CO directly represses the transcription of AP2 (a known regulatory gene of seed development) under LD conditions in Arabidopsis and SD conditions in soybean, thereby controlling seed size in a photoperiod-dependent manner, and that these effects are exerted through regulation of the proliferation of seed coat epidermal cells. Collectively, our findings reveal that a crucial regulatory cascade involving CO-AP2 modulates photoperiod-mediated seed development in plants and provide new insights into how plants with different photoperiod response types perceive seasonal changes that enable them to optimize their reproductive growth.
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