Zhang Yifan, Liu Yang, Ling Lin, Huo Wenwen, Li Yang, Xu Lu, Xiang Lili, Yang Yujie, Xiong Xingyao, Zhang Donglin, Yu Xiaoying, Li Yanlin
College of Horticulture, Hunan Agricultural University, Changsha 410128, China.
Engineering Research Center for Horticultural Crop Germplasm Creation and New Variety Breeding, Ministry of Education, Changsha 410128, China.
Plants (Basel). 2023 May 30;12(11):2169. doi: 10.3390/plants12112169.
Light quality is a vital environmental signal used to trigger growth and to develop structural differentiation in plants, and it influences morphological, physiological, and biochemical metabolites. In previous studies, different light qualities were found to regulate the synthesis of anthocyanin. However, the mechanism of the synthesis and accumulation of anthocyanins in leaves in response to light quality remains unclear. In this study, the var. "Xiangnong Fendai" plant was treated with white light (WL), blue light (BL), ultraviolet-A light (UL), and blue light plus ultraviolet-A light (BL + UL), respectively. Under BL, the leaves were described as increasing in redness from "olive green" to "reddish-brown". The chlorophyll, carotenoid, anthocyanin, and total flavonoid content were significantly higher at 7 d than at 0 d. In addition, BL treatment also significantly increased the accumulation of soluble sugar and soluble protein. In contrast to BL, ultraviolet-A light increased the malondialdehyde (MDA) content and the activities of three antioxidant enzymes in the leaves, including catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD), in varying degrees over time. Moreover, we also found that the -like gene, -like gene, -like gene, -like gene, -like gene, -like gene, -like gene, and -like gene were significantly upregulated. Furthermore, the -like, -like, and -like gene expressions related to antioxidase synthesis were found under ultraviolet-A light conditions. In summary, BL is more conducive to reddening the leaves of "Xiangnong Fendai" and will not lead to excessive photooxidation. This provides an effective ecological strategy for light-induced leaf-color changes, thereby promoting the ornamental and economic value of var. .
光质是一种重要的环境信号，用于触发植物的生长并促进其结构分化，并且它会影响植物的形态、生理和生化代谢产物。在先前的研究中，发现不同的光质可调节花青素的合成。然而，叶片中花青素响应光质的合成和积累机制仍不清楚。在本研究中，分别用白光（WL）、蓝光（BL）、紫外线-A光（UL）以及蓝光加紫外线-A光（BL + UL）处理“湘农粉黛”植株。在蓝光处理下，叶片被描述为从“橄榄绿”逐渐变红至“红棕色”。叶绿素、类胡萝卜素、花青素和总黄酮含量在第7天显著高于第0天。此外，蓝光处理还显著增加了可溶性糖和可溶性蛋白质的积累。与蓝光相反，紫外线-A光随时间不同程度地增加了叶片中丙二醛（MDA）含量以及三种抗氧化酶的活性，这三种抗氧化酶包括过氧化氢酶（CAT）、过氧化物酶（POD）和超氧化物歧化酶（SOD）。此外，我们还发现-like基因、-like基因、-like基因、-like基因、-like基因、-like基因、-like基因和-like基因显著上调。此外，在紫外线-A光条件下发现了与抗氧化酶合成相关的-like、-like和-like基因表达。总之，蓝光更有利于“湘农粉黛”叶片变红，且不会导致过度光氧化。这为光诱导叶片颜色变化提供了一种有效的生态策略，从而提升了“湘农粉黛”的观赏价值和经济价值。
