Colonization of Beauveria bassiana in Maize Seedlings and Its Effect on Their Physiological-biochemical Characteristics

doi:10.16409/j.cnki.2095-039x.2016.06.007

Abstract

Abstract: Colonization of Beauveria bassiana in maize seedlings and its effect on their physiological and biochemical characteristics was investigated by examining colonization positions (leaf, stalk and root) under 2 seed soaking durations (12 and 24 h), and measuring plant growth characteristics and activities of some resistance defense enzymes in 14 d old seedlings. Endophytic colonization of B. bassiana in leaves (40%) was greater than in stalks (10%), and no endophytic colonization in roots was found. Significant effects of seed soaking durations on bio-physiological parameters of maize seedlings were detected. Plant height was increased by 5.34% in 19 d old seedlings, and leaf area and aboveground biomass by 13.71% and 27.2% in 21 d and 28 d old seedlings, respectively. Activities of some resistance defense enzymes, including phenylalnine ammonialyase (PAL), polyphenoloxidase (PPO), superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD), were enhanced, with increase by 24.90% for SOD. Our study suggests that B. bassiana may have positive effects on plant growth, especially for seed soaking treatment for 12 h. In addition, changes in activities of defense enzymes may be dependent on the interactions between B. bassiana and the seedlings.

Key words: Beauveria bassiana, maize, colonization, physiological and biochemical characteristic

CLC Number:

S476.12

FEI Hongqiang, SUI Li, ZHU Hui, XU Wenjing, CHEN Rizhao, WANG Yangzhou, LI Qiyun, WANG Deli. Colonization of Beauveria bassiana in Maize Seedlings and Its Effect on Their Physiological-biochemical Characteristics[J]. journal1, 2016, 32(6): 721-727.

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