ABSTRACT

Prohydrojasmon (PDJ), a synthetic derivative of the plant hormone jasmonic acid, has been identified as a plant growth regulator used in various fruit and rice seedlings. In this study, we demonstrate the inhibition of transpiration by PDJ in the indica rice cultivar cv. Takanari compared with commercially available microcrystalline and paraffin wax agents in a greenhouse. Microcrystalline and paraffin wax agents inhibited approximately 30%–50% transpiration 3 h after application, and the inhibition lasted for seven days after treatment, depending on the concentration and the agent used. In contrast, PDJ inhibited approximately 40%–80% transpiration compared with control 0.5 h after treatment, and the effect lasted for one day. However, the effect almost disappeared 7 days after treatment. Thus, PDJ affects transpiration differently than commercially available products and could be used to lower excess transpiration in rice, specifically when an early, transient, and reversible inhibition is needed.

摘要

Prohydrojasmon (PDJ) 是植物激素茉莉酸的合成衍生物，已被确定为用于各种水果和水稻幼苗的植物生长调节剂。在这项研究中，我们证明了 PDJ 在籼稻品种 cv 中对蒸腾的抑制作用。Takanari 与温室中市售的微晶和石蜡剂进行了比较。微晶和石蜡剂在施用后 3 小时抑制约 30%–50% 的蒸腾作用，并且抑制作用在处理后持续 7 天，具体取决于浓度和使用的药剂。相比之下，PDJ在处理后0.5小时与对照相比抑制了约40%~80%的蒸腾作用，效果持续1天。然而，治疗后7天效果几乎消失。因此，