Stress-induced factors involved in flower formation in Lemna
Stress-induced factors involved in flower formation in Lemna
复制标题
浮萍花形成中的应激诱导因素
DOI：
10.1111/j.1399-3054.1994.tb03032.x
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发表时间：
1994
影响因子：
6.4
通讯作者：
Mineyuki Yokohama
中科院分区：
文献类型：
--
作者：
A. Takimoto;S. Kaihara;Mineyuki Yokohama
用0.3 ~ 1 μM去甲肾上腺素溶液浸泡干旱胁迫下的青萍Lemna paucicostata 441 2 h，可诱导青萍Lemna开花。151. history of life不仅干旱胁迫，而且渗透胁迫（在0.5M甘露醇溶液中5分钟）和热胁迫（在45-55°C热水中5分钟）在产生或释放能够激活去甲肾上腺素的因子方面是有效的。这种推定的因子已被命名为因子C。植物匀浆立即离心后获得的第一上清液仅具有弱的因子C活性，但第一沉淀物的悬浮液孵育30分钟后获得的第二上清液显示高的因子C活性。浮萍属植物在干旱和高温胁迫下浸泡2 h。即使在不添加去甲肾上腺素的情况下也显示出开花诱导活性。
At a concentration equivalent to 0.3–1 μM, the norepinephrine solution in which the drought-stressed plants of Lemna paucicostata 441 were immersed for 2 h, induced flowering in L. paucicosrata 151. Not only drought stress but also osmotic stress, 5 min on 0.5 M mannitol solution, and heat stress, 5 min on 45–55°C hot water, were effective in producing or releasing a factor capable of activating norepinephrine. Such a putative factor has been designated as factor C, The first supernatant obtained after immediate centrifugation of the homogenate of the plants had only weak factor C activity, hut the second supernatant, obtained after a 30-min incubation of the suspension of the first pellet, showed high factor C activity. The water in which Lemna plants subjected to both drought and heat stresses had been immersed for 2 h. showed flower-inducing activity even in the absence of added norepinephrine.