Cirillo Valerio, D'Amelia Vincenzo, Esposito Marco, Amitrano Chiara, Carillo Petronia, Carputo Domenico, Maggio Albino
Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Portici, Italy.
National Research Council of Italy, Institute of Biosciences and Bioresources (CNR-IBBR), Via Università 133, 80055 Portici, Italy.
Biology (Basel). 2021 Feb 10;10(2):139. doi: 10.3390/biology10020139.
Abiotic stresses will be one of the major challenges for worldwide food supply in the near future. Therefore, it is important to understand the physiological mechanisms that mediate plant responses to abiotic stresses. When subjected to UV, salinity or drought stress, plants accumulate specialized metabolites that are often correlated with their ability to cope with the stress. Among them, anthocyanins are the most studied intermediates of the phenylpropanoid pathway. However, their role in plant response to abiotic stresses is still under discussion. To better understand the effects of anthocyanins on plant physiology and morphogenesis, and their implications on drought stress tolerance, we used transgenic tobacco plants (AN1), which over-accumulated anthocyanins in all tissues. AN1 plants showed an altered phenotype in terms of leaf gas exchanges, leaf morphology, anatomy and metabolic profile, which conferred them with a higher drought tolerance compared to the wild-type plants. These results provide important insights for understanding the functional reason for anthocyanin accumulation in plants under stress.
非生物胁迫将是不久的将来全球粮食供应面临的主要挑战之一。因此，了解介导植物对非生物胁迫响应的生理机制非常重要。当受到紫外线、盐度或干旱胁迫时，植物会积累一些特殊的代谢产物，这些代谢产物通常与其应对胁迫的能力相关。其中，花青素是苯丙烷类途径中研究最多的中间产物。然而，它们在植物对非生物胁迫响应中的作用仍在讨论中。为了更好地理解花青素对植物生理和形态发生的影响，以及它们对干旱胁迫耐受性的影响，我们使用了在所有组织中都过度积累花青素的转基因烟草植株（AN1）。AN1植株在叶片气体交换、叶片形态、解剖结构和代谢谱方面表现出改变的表型，与野生型植株相比，这赋予了它们更高的耐旱性。这些结果为理解胁迫下植物中花青素积累的功能原因提供了重要见解。
