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首页> 外文期刊>Russian Journal of Plant Physiology >Hormonal control of sucrose phosphate synthase and sucrose synthase in sugar beet
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Hormonal control of sucrose phosphate synthase and sucrose synthase in sugar beet

机译：甜菜中蔗糖磷酸合酶和蔗糖合酶的激素控制

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摘要

We studied the effects of synthetic analogs of phytohormones (benzyladenine, IAA, and GA) on the activities of the enzymes catalyzing sucrose synthesis and metabolism, sucrose phosphate synthase (SPS, EC 2.4.1.14) and sucrose synthase (SS, EC 2.4.1.13), and on the content of chlorophyll and protein during the sugar-beet (Beta vulgaris L.) ontogeny. Plant spraying with phytohormonal preparations activated SPS in leaves; direct interaction between phytohormones and the enzyme also increased its activity. The degree of this activation differed during the ontogeny and in dependence on the compound used for treatment. Analogs of phytohormones maintained high protein level in leaves, retarded chlorophyll breakdown, and, thus, prolonged leaf functional activity during development. Phytohormonal preparations practically did not affect the SS activity both after plant treatment and at their direct interaction with the enzyme. It is supposed that the SS activity in sugar-beet roots is controlled by sucrose synthesized in leaves rather than by phytohormones. The effects of hormones on leaf metabolism were mainly manifested in growth activation.
机译：我们研究了植物激素的合成类似物（苄基腺嘌呤，IAA和GA）对催化蔗糖合成和代谢的酶，蔗糖磷酸合酶（SPS，EC 2.4.1.14）和蔗糖合酶（SS，EC 2.4.1.13）活性的影响。 ），以及甜菜（Beta vulgaris L.）发育过程中叶绿素和蛋白质的含量。用植物激素制剂喷洒植物激活叶片中的SPS;植物激素与酶之间的直接相互作用也增加了其活性。这种活化的程度在个体发育过程中有所不同，并取决于用于治疗的化合物。植物激素的类似物在叶片中维持高蛋白水平，阻止叶绿素分解，因此在发育过程中延长了叶片的功能活性。植物激素制剂实际上在植物处理后以及与酶的直接相互作用上均不影响SS活性。据推测，甜菜根中的SS活性是由叶片中合成的蔗糖而不是植物激素控制的。激素对叶片代谢的影响主要表现在生长活化上。

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