Jasmonic acid stimulates the expression of nod genes in Rhizobium

被引:33
作者
Rosas, S [1 ]
Soria, R [1 ]
Correa, N [1 ]
Abdala, G [1 ]
机构
[1] Univ Nacl Rio Cuarto, Fac Ciencias Exactas, Dept Ciencias Nat, RA-5800 Rio Cuarto, Argentina
关键词
nod genes; jasmonates; salicylic acid;
D O I
10.1023/A:1006064807870
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Jasmonates and salicylic acid are considered to be signal molecules that induce a variety of plant genes involved in wound or defence response, as well as affecting nos promoter activity. In this paper we examined whether these chemicals could also affect nod genes from isogenic rhizobia strains. Isogenic strains contain the Rhizobium leguminosarum nodA promoter fused to the lacZ gene of Escherichia coli and differ only in the source of the regulatory nodD gene. Naringenin, jasmonic acid and methyl jasmonate induced expression of nod genes in strain RBL 1284 and salicylic acid showed no activity alone or when used in combination with other compounds; addition of naringenin + jasmonic acid produced a synergistic effect. Results obtained with strain RBL5284 were similar to those for RBL1284 albeit the combination of naringenin with the other compounds markedly inhibited nod gene expression. Whereas RBL5283 responded to naringenin with a strong induction, jasmonic acid, methyl jasmonate or salicylic acid showed no significant responses. The inhibitory effect of salicylic acid on nod gene expression indicates that the induction mechanism of jasmonic acid, methyl jasmonate, N-propyldihydrojasmonate and naringenin is probably different from that of salicylic acid.
引用
收藏
页码:1161 / 1168
页数:8
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