摘要
以"翠玉特早王"西葫芦幼苗为试材,研究了不同浓度水杨酸(SA)浸种对西葫芦幼苗生长及抗氧化酶活性的影响。结果表明:与清水浸种相比,0.25～1.00mmol/L的SA浸种能不同程度地增加西葫芦幼苗的株高、叶面积、地上部分鲜重、总根数、总根长、根系鲜重及根冠比,而4.00mmol/L的SA浸种时各项指标均降低;0.50～2.00mmol/L SA浸种能使西葫芦幼苗的叶绿素含量及根系活力明显增加,而4.00mmol/L SA浸种时则明显降低;0.25～1.00和0.25～2.00mmol/L SA浸种能不同程度地增加西葫芦幼苗地下和地上部分的超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性,4.00mmol/L SA浸种时则降低3种酶的活性;低浓度SA浸种能促进西葫芦幼苗生长,并能提高其抗氧化酶活性;高浓度SA浸种对西葫芦幼苗生长及抗氧化酶活性均具有抑制作用,0.50～1.00mmol/L的SA浸种效果最好。
Taking seedling of Cucurbita pepo L.＇Cuiyutezaowang＇ as materials,the effects of soaking seed with different concentrations of SA on growth and the activity of antioxidant enzymes of Cucurbita pepo L.seedling were studied.The results showed that,seed soaked with SA 0.25-1.00 mmol/L could raise the plant height,leaf area,aerial parts of the fresh weight,total root number,total root length,root fresh weight and root cap ratio of Cucurbita pepo L.seedling at different degrees,while all the indicators were obviously decreased when seed soaked with 4.00 mmol/L SA;seed soaked with SA 0.50-2.00 mmol/L could raise the chlorophyll content and root vigor of Cucurbita pepo L.seedling significantly,while they obviously decreased when seed soaked with 4.00 mmol/L SA;seed soaked with SA 0.25-1.00 mmol/L and 0.25-2.00 mmol/L could raise the SOD,POD and CAT activity of underground portion and ground of Cumcurbita pepo L.seedling in varying degrees,while the SOD,POD and CAT activity were decreased when seed soaked with 4.00 mmol/L SA.Seed soaked with SA of low concentration could improve the growth of Cumcurbita pepo L.seedling,increase its antioxidase activity;while seed soaked with SA of high concentration could inhabit its growth and antioxidase activity.Seed soaked 0.50-1.00 mmol/L worked the best.
出处
《北方园艺》
CAS
北大核心
2013年第13期1-5,共5页
Northern Horticulture
基金
国家自然科学基金资助项目(30871483/C1303)
关键词
水杨酸(SA)
浸种
西葫芦
生长
抗氧化酶
salicylic acid
soaking seed
Cucurbita pepo L.
growth
antioxidant enzymes
