乙烯抑制剂恢复豌豆 cv 火花 sym5 突变体的结瘤。
Ethylene Inhibitors Restore Nodulation to sym 5 Mutants of Pisum sativum L. cv Sparkle.
机构信息
Boyce Thompson Institute for Plant Research, Ithaca, New York 14853-1801.
出版信息
Plant Physiol. 1991 May;96(1):239-44. doi: 10.1104/pp.96.1.239.
Abstract
The sym 5 mutants of pea, Pisum sativum L. cv Sparkle, do not differ in growth habit from their normal parent and nodulate poorly at a root temperature of 20 degrees C. If inhibitors of ethylene formation or action (Co(2+), aminoethoxyvinylglycine, or Ag(+)) are added to the substrate, nodulation of the sym 5 mutants is increased. Similar treatments of four other mutant sym lines do not restore nodulation. When Ag(+) is added to the substrate from 4 days before to 4 days after inoculation with rhizobia, nodulation of sym 5 mutants is increased. The roots of the mutant need only be exposed to Ag(+) for 4 hours to significantly increase nodule numbers. The content of free 1-aminocyclopropane-1-carboxylic acid and the production of ethylene in the lateral roots of sym 5 mutants do not differ from Sparkle.
摘要
豌豆 sym5 突变体与正常亲本在生长习性上没有差异，但在 20°C 的根温下结瘤不良。如果在培养基中添加乙烯形成或作用的抑制剂（Co（2+）、氨基乙氧基乙烯基甘氨酸或 Ag（+）），sym5 突变体的结瘤会增加。对其他四个突变 sym 系的类似处理并不能恢复结瘤。当 Ag（+）从接种根瘤菌前 4 天添加到接种后 4 天的培养基中时，sym5 突变体的结瘤会增加。突变体的根只需暴露于 Ag（+）4 小时，就可以显著增加根瘤数量。sym5 突变体侧根中的游离 1-氨基环丙烷-1-羧酸含量和乙烯的产生与 Sparkle 没有差异。
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