Correlation between changes in cell ascorbate and growth of Lupinus albus seedlings
Correlation between changes in cell ascorbate and growth of Lupinus albus seedlings
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DOI：
10.1016/s0176-1617(97)80125-3
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发表时间：
1997-02-01
影响因子：
4.3
通讯作者：
Liso, R
中科院分区：
文献类型：
--
作者：
Arrigoni, O;Calabrese, G;Liso, R
当抗坏血酸（Asc）含量通过实验提高时，羽扇豆幼苗的生长会受到刺激；相反，当石蒜碱（一种抑制 Asc 生物合成的生物碱）降低 Asc 含量时，生长就会受到抑制。 Asc对生长的刺激是由于促进细胞分裂和细胞扩张。Asc系统的氧化还原酶以不同的方式响应Asc的变化。 Asc 过氧化物酶是细胞中受 Asc 变化影响最大的酶：其活性随着 Asc 含量的增加或减少而增加或减少。脱氢抗坏血酸（DHA）还原能力受到相反的影响：当Asc含量升高时，细胞的DHA还原能力下降，而当Asc含量降低时，DHA还原能力升高。抗坏血酸自由基 (AFR) 还原酶活性不随 Asc 含量的变化而变化。讨论了 Asc 氧化还原酶的可能调节功能。
The growth of Lupinus albus seedlings is stimulated when ascorbate (Asc) content is experimentally raised; on the contrary, when Asc content is lowered by lycorine - an alkaloid inhibiting Asc biosynthesis - the growth is inhibited. The stimulation of growth by Asc is due to the promotion of cell division and cell expansion.Redox enzymes of the Asc system respond in different manners to the Asc changes. Asc peroxidase is the enzyme that is most affected by Asc changes in the cell: its activity increases or decreases in parallel with the Asc content. Dehydroascorbic acid (DHA.) reduction capability is affected in the opposite way: when Asc content rises, the DHA, reduction ability of the cells drops, while it rises when Asc decreases. Ascorbate free radical (AFR) reductase activity does not vary with changing Asc content. A possible regulatory function of Asc redox enzymes is discussed.