Respiratory Transition during Seed Germination.
Respiratory Transition during Seed Germination.
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种子萌发期间的呼吸转变。
DOI：
10.1104/pp.57.2.274
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发表时间：
1976
期刊：
影响因子：
7.4
通讯作者：
A. Leopold
中科院分区：
文献类型：
--
作者：
S. Yentur;A. Leopold
以韦恩大豆（Glycine max Merr.）表明在萌发的第4和第8小时之间，呼吸经历了从对水杨基异羟肟酸敏感的主要“交替”呼吸到氰化物敏感呼吸的转变。早期萌发阶段对交替呼吸的依赖反映在几种类型的种子功能中，包括随后的根生长速率、叶绿素合成和萌发本身。发芽的早期需要正常的O（2）张力，这在后期阶段不再是必需的。对氰化物和水杨基异羟肟酸的敏感性变化被发现是常见的七种不同类型的发芽种子。有人提出，呼吸的替代途径为完成种子萌发的最早阶段提供了必要的条件。
Experiments with germinating seeds of Wayne soybean (Glycine max Merr.) show that between the 4th and the 8th hour of germination, respiration experiences a transition from predominantly "alternate" respiration, which is sensitive to salicylhydroxamic acid, to a cyanide-sensitive respiration. The dependence of early germination stages on alternate respiration is reflected in several types of seed functions, including subsequent root growth rate, chlorophyll synthesis, and germination itself. The early period of germination is shown to require a normal O(2) tension, which is no longer a requirement at later stages. The changing sensitivity to cyanide and to salicylhydroxamic acid is found to be common to seven different types of germinating seeds. It is proposed that the alternate pathway of respiration provides something essential for the completion of the earliest stages of seed germination.