Hormonal regulation in nitrate and sulfate assimilation under sulfur deficient condition in Brassica napus L.
(0) To investigate possible roles of plant hormones in sulfate and nitrate assimilation, phytohormone, enzyme involved in N/S assimilation were assessed.Under S deficient condition, a significant induction of salicylic acid (SA) was detected, the exogenous supply of cysteine (Cys) and sulfate to S-deprived plants resulted in a marked increase of SA.However, no significant changes were observed in the content of indole-3-acetic acid (IAA) and jasmonic acid (JA).N/S assimilation related enzymes such as ATP sulfurylase (ATPs), adenosine 5′-phosphosulfate reductase (APR), nitrate reductase (NR) and glutamine synthetase (GS) were depressed by S deficiency but not O-acetylserine (thiol) lyase (OASTL).The addition of Cys, sulfate and glutamine (Gln) tended to recover those enzymatic activities.The findings indicate that SA induction as affected by sulfur deficiency may involve in the manipulation of sulfate and nitrate metabolism via the activation of assimilatory enzymes O-acetylserine (thiol) lyase and glutamine synthetase.
phytohormones regulation of N/S assimilation
Qian Zhang Bok-Rye Lee Tae-Hwan Kim
Department of Animal Science, Institute of Agricultural Science and Technology, College of Agriculture & Life Science, Chonnam National University, Buk-Gwangju, P.O Box 205, Gwangju 500-600, South Korea
国际会议
The 5th China-Japan-Korea Grassland Conference(第五届中-日-韩国际草地会议)
长春
英文
123-124
2014-08-20（万方平台首次上网日期，不代表论文的发表时间）