咯菌腈对西瓜幼苗生长及抗病性相关酶活性的影响

 测定了有效成分为咯菌腈的2.5%适乐时悬浮种衣剂包衣处理西瓜种子后对种子发芽、幼苗生长及其植株体内抗病性相关酶活性的影响。结果表明,种衣剂包衣对种子发芽率以及幼苗的子叶宽度、侧根数和百株鲜重无显著影响;幼苗子叶长度和株高分别增加了4.8%和7.5%,植株体内丙二醛的积累量下降了7.7%,可溶性蛋白含量增加了2.2%;过氧化物酶、过氧化氢酶、多酚氧化酶和苯丙氨酸解氨酶的含量分别较对照提高了62.9%、46.5%、35.6%和44.1%,与对照相比,差异显著。说明咯菌腈处理西瓜种子后发芽安全,并能促进幼苗生长,提高抗病性相关酶的活性。

Effects of fludioxonil on growth of watermelon seedlings and activity of disease resistance-related enzymes

Effects of 2. 5% Celest seed coating formulation (a. i. fludioxonil) were examined on the germination , growth and development of watermelon seedlings and the activity of disease resistance-related enzymes in watermelon seedlings. The results showed that the germination rate, the width of cotyledon, the number of sideroots and the fresh weight of one hundred seedlings did not change in coated seedlings. However, cotyledon and seedlings were 4-8% longer and 7.5% higher after treatment. Moreover, 1. 7% decrease in accumulation of malondialdehyde(MDA) and 2. 2% increase in content of soluble protein were found through the coating treatment. The activities of peroxidase (POD), catalase (CAT), polyphenoloxidase (PPO) and phenylalanine ammonia lyase(PAL) in watermelon seedlings were 62. 9%, 46.5%, 35.6% and 44. 1% higher than those of the untreated, respectively. It was concluded that the germination of watermelon seeds treated by the chemical was safe, the growth and development oi seedlings were promoted and the activity of diseases resistance-related enzymes was also increased.