Auxin also causes the plant to develop a vascular system, to form lateral roots, and to produce ethylene.
生长素还能使植物形成维管系统，形成侧根，并产生乙烯。
The tree-shaped structure of nodular vascular framework is connected with the vascular system of plant in the base, It was derived originally from the plant lateral root primordium.
它在基部与植物维管系统联成一体，在本质上是由植物侧根原基衍生而来。
The tree-shaped structure of nodular vascular framework is connected with the vascular system of plant in the base, It was derived originally from the plant lateral root primordium.
它在基部与植物维管系统联成一体，在本质上是由植物侧根原基衍生而来。
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