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小麦的茎是植株体内水分和营养物质运输的主要通道。根所吸收的水分和矿质元素通过茎运送到叶里,作为制造各种有机物的原料;而叶所制造的有机物也必须通过茎运送到根和其它部位利用或在茎中暂时贮存起来。茎又是支持器官,它支持着地上部分,尤其是把叶支持在适当的空间,有利于接受太阳光进行光合作用。小麦茎上长叶的地方叫节,节与节之间的部位叫节间。北京地区适期播种的小麦,主茎一般具有12—13个节和13—14个节间(包括穗下节间与地中茎)。小麦拔节以前,茎的节间不伸长,节与节挨得很近,各叶和分叶(或腋芽,又叫分叶芽)以及各节上的不定根
The stems of wheat are the main channels for the transport of moisture and nutrients in plants. Moisture and mineral elements absorbed by the roots are transported to the leaves through the stems as raw materials for the manufacture of various organic materials; the organic matter produced by the leaves must also be transported to the roots and other parts by the stems for temporary storage in the stems. The stem is also an organ of support, which supports the aerial parts, especially the leaves, which are supported in the proper space, which is good for accepting the sunlight for photosynthesis. Wheat stems on the long leaves called the festival, the festival is called the node between the sections. Wheat suitable for sowing in Beijing, the main stem typically has 12-13 nodes and 13-14 internodes (including the inferior panicles and the mid-stems). Before the jointing of wheat, the internodes of the stems did not elongate, and the nodes and nodes were very close, and the leaves and leaves (or axillary buds, also called leaf buds) and the adventitious roots