School of Environmental and Life Science, University of Newcastle, NSW, 2308, Australia; Centre of Plant Reproductive and Stress Biology, Northwest A&F University, Shaanxi, 712100, China.
J Plant Physiol. 2022 Jan;268:153572. doi: 10.1016/j.jplph.2021.153572. Epub 2021 Nov 18.
Reproductive development is critical for completion of plant life cycle and realization of crop yield potential. Reproductive organs comprise multiple distinctive or even transgenerational tissues, which are symplasmically disconnected from each other for protection and better control of nutrition and development. Cell wall invertases (CWINs) and sugar transporters are often specifically or abundantly expressed in these apoplasmic interfaces to provide carbon nutrients and sugar signals to developing pollens, endosperm and embryo. Emerging evidence shows that some of those genes were indeed targeted for selection during crop domestication. In this Opinion paper, I discuss the functional significance of the localized expression of CWINs and sugar transporters in reproductive organs followed by an analysis on how their spatial patterning may be regulated at the molecular levels and how the localized CWIN activity may be exploited for improvement of reproductive output.
生殖发育对于完成植物生命周期和实现作物产量潜力至关重要。生殖器官由多个不同的甚至跨代的组织组成，它们为了保护和更好地控制营养和发育而彼此间没有细胞质联系。细胞壁转化酶（CWINs）和糖转运蛋白通常在这些质外体界面特异性或丰富表达，为发育中的花粉、胚乳和胚胎提供碳营养和糖信号。新出现的证据表明，在作物驯化过程中，这些基因中的一些确实是选择的目标。在本观点文章中，我讨论了 CWINs 和糖转运蛋白在生殖器官中的局部表达的功能意义，随后分析了它们的空间模式如何在分子水平上受到调控，以及局部 CWIN 活性如何被利用来提高生殖产量。
