|Table of Contents|

Physiological Mechanism in the Growth Promoting Effect of Phosphate Solubilizing Bacteria 3P29 on Pepper

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年22
Page:
8-16
Research Field:
Publishing date:

Info

Title:
Physiological Mechanism in the Growth Promoting Effect of Phosphate Solubilizing Bacteria 3P29 on Pepper
Author(s):
AN Dong; CHE Yongmei; ZHAO Fanggui; LI Yahua; YANG Decui; LIU Xin
(Life Science College，Qingdao Agricultural University/Key Lab of Plant Biotechnology in Universities of Shandong Province,Qingdao,Shandong 266109)
Keywords:
phosphate-solubilizing bacteria; pepper; growth; physiological mechanism
PACS:
-
DOI:
10.11937/bfyy.20191118
Abstract:
Phosphate (P)-solubilizing bacteria was the soil-born microorganism,which could convert insoluble P in the soil into plant-available P,and was the promising material for producing biofertilizer.Taking pepper as material,the effects of 3P29 on the growth parameters as well as physiological parameters,such as activities of nitrogen (N) metabolism enzymes,phyotosynthetic gas exchange and fluorescence parameters of pepper seedlings were examined,with the aim to uncover the physiological mechanism in the growth,promoting effect of 3P29 and provide theoretical base for the exploitation of 3P29.The results showed that application of 3P29 increased the shoot diameter,as well as dry and fresh weight of aerial and underground parts of pepper seedlings,prompted its growth3P29 treatment elevated the content of mineral nutrient,such as nitrogen(N),phosphorus(P) and potassium (K),as well as soluble protein in pepper leaves,and enhanced activities of enzymes involved in N metabolism,such as nitrate reductase (NR),glutamine synthetase (GS) and glutamate dehydrogenase (GDH) in pepper roots and leaves.Meanwhile,pepper seedlings treated with 3P29 exhibited increased foliar chlorophyll level,gas exchange parameters (Pn,Ci,Gs and E),fluorescence parameters (ΦPSⅡ,qP,ETR and RC/CS0),as well as water use efficiency compared to those of the untreated control,but showed decrease in NPQ.These results manifested that 3P29 application prompted N metabolism,enhanced PSⅠand PSⅡ activities,elevated photosyethetic capacity,so improved the growth of pepper seedlings.

References:

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Last Update: 2019-12-10