Karthikeyan B, Jaleel C A, Gopi R, Deiveekasundaram M
Department of Microbiology, Faculty of Agriculture, Annamalai University, Annamalainagar 608 002, Tamilnadu, India.
J Zhejiang Univ Sci B. 2007 Jul;8(7):453-7. doi: 10.1631/jzus.2007.B0453.
An experiment was conducted on Catharanthus roseus to study the effect of seed treatments with native diazotrophs on its seedling growth and antioxidant enzyme activities. The treatments had significant influence on various seedling parameters. There is no significant influence on dry matter production with the diazotrophs, Azospirillum and Azotobacter. However, the vital seedling parameters such as germination percentage and vigour index were improved. Azotobacter treatment influenced maximum of 50% germination, whereas Azospirillum and Azotobacter were on par with C. roseus with respect to their vigour index. There was significant difference in the population of total diazotrophs. Azospirillum and Azotobacter between rhizosphere and non-rhizosphere soils of C. roseus had the same trend and were observed at various locations of the study. The activities of antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POX) and catalase (CAT) were increased to a significant extent due to the treatment with diazotrophs.
以长春花为实验对象，研究用本地固氮菌进行种子处理对其幼苗生长和抗氧化酶活性的影响。这些处理对各种幼苗参数有显著影响。固氮菌（如固氮螺菌和固氮菌）对干物质产量没有显著影响。然而，重要的幼苗参数如发芽率和活力指数得到了提高。固氮菌处理的发芽率最高可达50%，而固氮螺菌和固氮菌在活力指数方面与长春花相当。总固氮菌数量存在显著差异。长春花根际和非根际土壤中的固氮螺菌和固氮菌具有相同的趋势，并且在研究的各个地点都有观察到。由于用固氮菌处理，超氧化物歧化酶（SOD）、过氧化物酶（POX）和过氧化氢酶（CAT）等抗氧化酶的活性显著提高。
