脱落酸在植物抗镉胁迫中的作用

Roles of Abscisic Acid in Resistance to Cadmium Stress of Plants

镉(Cd)作为环境中广泛分布且具有潜在毒害作用的重金属污染物之一,易被植物吸收、富集并引起中毒,例如植物生长发育和光合作用受到抑制,叶片黄化和细胞死亡等,严重情况下还会导致死亡。因此,缓解植物Cd胁迫的研究尤为重要。脱落酸作为一种植物胁迫激素,能通过调控植物生长、降低Cd吸收量等在植物抗Cd胁迫应答反应中发挥重要作用。本文综述了脱落酸在Cd诱导的植物胁迫中所发挥的作用及其在缓解Cd毒性作用中的潜在机理。

As a widespread and potentially toxic environmental pollutant,cadmium is easily taken up and absorbed by plants,which results in toxicity symptoms, including growth and photosynthesis retardation,leaf chlorosis, cell apoptosis, even plant death. So it is important to research how to alleviate Cd toxicity in plant. As a antistress hormone ,abscisic acid can regulate growth and development of the plant and decrease Cd accumulation. This article reviewed the influence of ABA on stress in plants and potential regulation mechanism for alleviating Cd toxicity.