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Comparative Analysis of Growth Promotion and Resistance Induction ofPepper Plants to Meloidogyne incognita by Two Endophytes(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2019年04期
Page:
77-84
Research Field:
·生命科学·
Publishing date:

Info

Title:
Comparative Analysis of Growth Promotion and Resistance Induction ofPepper Plants to Meloidogyne incognita by Two Endophytes
Author(s):
Yang Yaru; Mao Shaoxing; Yan Shuzhen; Lu Changmei
School of Life Sciences,Nanjing Normal University,Nanjing 210023,China
Keywords:
endophyte; Capsicum annuum; Meloidogyne incognita; growth promotion; resistance; yield
PACS:
S43
DOI:
10.3969/j.issn.1001-4616.2019.04.011
Abstract:
Meloidogyne incognita is the most common soil borne disease of pepper. Two endophytes,SZ5(Bacillus cereus)and DLJ1(Pseudomonas fluorescens biovar I),which can produce ACC deaminase,were used as materials to study their effects on the growth and resistance of pepper plants to M.incognita. Results showed that although the two endophytes could not promote seed germination,they could promote seedling growth for a short time. After the short-term effect disappeared,the contents of secondary metabolites and the activities of antioxidant enzymes of plants in test groups were still higher than those in the control,and those in the DLJ1 group were higher than those in the SZ5 group. After challenge inoculation with M.incognita,the activities of POD etc. and the contents of total flavonoids in the test plants were higher than those in the control. Treatment with DLJ1 or SZ5 reduced the infection rate and degree of M.incognita in plants,increased the yield and quality of pepper fruits. The effects of once inoculation at germination stage were better than those of multiple inoculations at transplantation and later,those of DLJ1 inoculation was better than those of SZ5 inoculation. In a word,once DLJ1 inoculation at germination stage can effectively promote the growth of pepper plants,increase its resistance to M.incognita and increase the yield and quality of its fruits. These effects may be related to the effective colonization of strains at germination,the maintenance of antioxidant capacity and efficient response of plants to stress,as well as the effective reduction of ethylene production in plants at growth stage.

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Last Update: 2019-12-31