A TEMPERATURE-SENSITIVE NODULATION MUTANT (SYM-5) OF PISUM-SATIVUM L

被引:7
作者
FEARN, JC
LARUE, TA
机构
[1] Boyce Thompson Institute for Plant Research, Ithaca, New York
关键词
PISUM-SATIVUM (L); LEGUMINOSAE; PEA; NODULATION; TEMPERATURE-SENSITIVITY; SYM GENES;
D O I
10.1111/j.1365-3040.1991.tb01339.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
In peas (Pisum sativum L.) homozygous for sym 5, nodulation has an unusual temperature dependence. These sym 5 mutants nodulate poorly at a root temperature of 20-degrees-C but nodulate better at 12-degrees-C. By lowering the root temperature of the sym 5 mutants from a lightroom temperature of 20/15-degrees-C to a constant 12-degrees-C, 8d after planting, the number of nodules can be further increased. A cool period (12-degrees-C) as short as 6h, early in the infection process, is sufficient to significantly increase nodulation of plants otherwise growing at 20/15-degrees-C. This temperature-sensitivity of nodulation is not due to a temperature induced change of a sym 5-related, 66-kD peptide but may involve accumulation of a gas in the rhizosphere.
引用
收藏
页码:221 / 227
页数:7
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