商品描述
二氢茉莉酸丙酯(PDJ)是一种人工合成的植物生长调节剂,与维管束植物中普遍存在的天然植物调节剂茉莉酸(JA)的结构相似,具有相同功能和相似的作用模式,对环境低毒。该物质在植物表面和体内以缓释方式产生茉莉酸分子并具有极强的诱导抗逆和增产作用。PDJ还可以促进苹果、葡萄等果实着色及提早成熟。PDJ具有以下生理效应:①0.01-0.1mg/LPDJ浸种对发根,幼苗生长表现出促进效果,但大于0.1mg/L表现抑制;②促进苗期生长,增强抗逆性;③促进幼果脱落;④促进果实成熟。
关于PDJ应用的科学研究如下:
(1)研究不同浓度二氢茉莉酸丙酯(PDJ)、茉莉酸甲酯(MeJA)对葡萄果实着色及品质的影响,实验结果表明:PDJ、MeJA处理能够显著提高果皮中花色苷含量,降低叶绿素a、b含量,改善果实色泽;PDJ、MeJA处理能够显著提高果实可溶性固形物、维生素C含量,促进果皮中总酚、类黄酮的积累,改善果实品质。
(2)The effects of the application of the jasmonic acid (JA) derivative n-propyl dihydrojasmonate (PDJ) on lesion diameter,endogenous abscisic acid (ABA), phaseic acid (PA), JA, aroma volatiles, and antioxidant activity showed that PDJ applicationdecreased the Lesion diameters. PDJ application before inoculation increased ABA and PA concentrations, and the synergistic effectof JA and ABA may play a role in the defense mechanism against pathogen infection in grape berries. In addition, PDJ applicationgenerally increased the production of aldehydes, esters, and terpenes. These volatiles may also be associated with resistance topathogen infection.