Gong Fushuai, Zhou Xiangru, Yu Wang, Xu Hongwei, Zhou Xiaofu
Jilin Provincial Key Laboratory of Plant Resource Science and Green Production, Jilin Normal University, Siping 136000, China.
Plants (Basel). 2024 Apr 9;13(8):1062. doi: 10.3390/plants13081062.
() development is hampered by UV-B sunlight because it damages the photosynthetic system and encourages the buildup of carotenoids. Nevertheless, it is still unclear how repairs the photosynthetic system to encourage the formation of carotenoid pigments. The carotenoid and abscisic acid (ABA) concentrations of the were ascertained in this investigation. Following UV-B stress, the level of carotenoids was markedly increased, and there was a strong correlation between carotenoids and ABA. The modifications of 's OJIP transient curves were examined in order to verify the regulatory effect of ABA on carotenoid accumulation. It was discovered that external application of ABA lessened the degree of damage on the donor side and lessened the damage caused by UV-B stress on . Additionally, integrated metabolomics and transcriptomics were used to examine the changes in differentially expressed genes (DEGs) and differential metabolites (DMs) in in order to have a better understanding of the role that ABA plays in carotenoid accumulation. The findings indicated that the majority of DEGs were connected to carotenoid accumulation and ABA signaling sensing. To sum up, we proposed a method for carotenoid accumulation. UV-B stress activates ABA production, which then interacts with transcription factors to limit photosynthesis and accumulate carotenoids, such as MYB-enhanced carotenoid biosynthesis. This study showed that 's damage from UV-B exposure was lessened by carotenoid accumulation, and it also offered helpful suggestions for raising the carotenoid content of plants.
（）的发育受到紫外线B阳光的阻碍，因为它会破坏光合系统并促进类胡萝卜素的积累。然而，目前仍不清楚（）如何修复光合系统以促进类胡萝卜素色素的形成。在本研究中测定了（）的类胡萝卜素和脱落酸（ABA）浓度。在紫外线B胁迫后，类胡萝卜素水平显著增加，并且类胡萝卜素与ABA之间存在很强的相关性。为了验证ABA对类胡萝卜素积累的调节作用，研究了（）的OJIP瞬态曲线的变化。结果发现，外源施用ABA减轻了供体侧的损伤程度，并减轻了紫外线B胁迫对（）造成的损害。此外，综合代谢组学和转录组学被用于研究（）中差异表达基因（DEGs）和差异代谢物（DMs）的变化，以便更好地了解ABA在类胡萝卜素积累中所起的作用。研究结果表明，大多数DEGs与类胡萝卜素积累和ABA信号感知有关。综上所述，我们提出了一种促进（）类胡萝卜素积累的方法。紫外线B胁迫激活ABA的产生，然后ABA与转录因子相互作用，限制光合作用并积累类胡萝卜素，如MYB增强类胡萝卜素生物合成。本研究表明，类胡萝卜素积累减轻了（）因紫外线B照射而造成的损伤，并且还为提高植物类胡萝卜素含量提供了有益的建议。
