一株产多胺菌的分离及NaCl胁迫下对黄瓜幼苗生长的影响

一株产多胺菌的分离及NaCl胁迫下对黄瓜幼苗生长的影响

辛树权;母若雨;时东方;刘军

【期刊名称】《吉林农业大学学报》 【年(卷),期】2017(039)006

【摘要】We selected several bacterial strains with the capacity of producing polyamine around the rhizospheric soil of Chinese wildrye by using arginine as the sole nitrogen source through selectionenriching way,and explored the promoting mechanism of polyamine producing bacteria on plant growth.We used cucumber seedlings as materials and cultured them with nutritious solution in sands,and studied the effects of polyamine producing bacteria on the growth of cucumber seedlings treated with NaCl stress.The results indicated that NaCl stress significantly inhibited the growth of cucumber seedlings,meanwhile the content of chloroplast pigments reached a lower level,MAD reached a higher level,and the activity of antioxidase was on a significant rise,whereas the inhibition effect of cucumber seedlings ameliorated much

when

inoculated

with

polyamine

producing

bacteria,simultaneously the content of chloroplast pigments and activity of antioxidase were higher than the group treated with NaCl,with the exception of a lower content of MAD.The trial showed that polyamine producing bacteria can affect the metabolism of plant treated with NaCl and enhance plant resistance to NaCl stress.%采用富集筛选法,以精氨酸为