Objective: To investigate the effect of plant growth substances on induction and culture of callus from Rhodiola quadrifida and also to analyze salidroside contents in the callus.

目的：考察植物生长物质对四裂红景天愈伤组织诱导和培养的影响并分析愈伤组织中红景天苷含量。

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In one way or another all these various regulatory substances intervene and exert recognizable effects upon the overall course of plant growth and development.

所有这些不同的调节物质以这种或那种方式参与植物生长发育的全过程。

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The light or the absence of inhibitory effect of other plant exogenous growth substances to Botritis cinerea was the main factor that they didn't control tomato gray mould disease steadily.

其他外源植物生长物质对灰霉病菌抑菌活性差或没有抑菌活性因而对番茄灰霉病的控制作用不稳定。

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Zetia blocks the absorption not only of cholesterol, but also of substances called plant sterols, chemicals found in fruits and vegetables that may slow tumor growth.

FORBES: Another Storm Brewing For Vytorin