采用示踪技术探索了3 H JA的运输和分配规律及其受伤害胁迫的影响。外源 3 H JA能够在小麦幼苗体内向上和向下运输 ,局部灼伤其运输与分配都发生了改变。从小麦根系饲喂的3 H JA ,在植株内的分布量依序为根 >茎 >叶 ,时间较长 (4h...采用示踪技术探索了3 H JA的运输和分配规律及其受伤害胁迫的影响。外源 3 H JA能够在小麦幼苗体内向上和向下运输 ,局部灼伤其运输与分配都发生了改变。从小麦根系饲喂的3 H JA ,在植株内的分布量依序为根 >茎 >叶 ,时间较长 (4h)时分配于心叶的3 H JA大大增加。当叶片受到局部灼伤时3 H JA向地上部的输出量减少 ;但局部灼伤可加快由心叶饲喂的3 H JA的向下运输 ,改变3 H JA在小麦幼苗各部位的分配比率。心叶饲喂短时间 (5min)时 ,3 H JA主要积累在受到伤胁迫的展开叶 (第 2叶 )中。向展开叶 (第2叶 )饲喂的3 H JA向下运输的速率高于向上运输的速率。展开更多
DNA is the genetic material that contains the 'instructions' to not only guide the continuation of life but also govern the development, metabolism and functioning of living organisms. DNA damage occurs daily ...DNA is the genetic material that contains the 'instructions' to not only guide the continuation of life but also govern the development, metabolism and functioning of living organisms. DNA damage occurs daily due to various exogenous (environ-展开更多
文摘采用示踪技术探索了3 H JA的运输和分配规律及其受伤害胁迫的影响。外源 3 H JA能够在小麦幼苗体内向上和向下运输 ,局部灼伤其运输与分配都发生了改变。从小麦根系饲喂的3 H JA ,在植株内的分布量依序为根 >茎 >叶 ,时间较长 (4h)时分配于心叶的3 H JA大大增加。当叶片受到局部灼伤时3 H JA向地上部的输出量减少 ;但局部灼伤可加快由心叶饲喂的3 H JA的向下运输 ,改变3 H JA在小麦幼苗各部位的分配比率。心叶饲喂短时间 (5min)时 ,3 H JA主要积累在受到伤胁迫的展开叶 (第 2叶 )中。向展开叶 (第2叶 )饲喂的3 H JA向下运输的速率高于向上运输的速率。
文摘DNA is the genetic material that contains the 'instructions' to not only guide the continuation of life but also govern the development, metabolism and functioning of living organisms. DNA damage occurs daily due to various exogenous (environ-