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用~(14)C 示踪法研究了冬小麦在冬前分蘗期主茎和2个一级分蘗各叶同化物的输出方向和供应范围。主茎和分蘖最顶部1片展开叶(O 叶)主要供应主茎和该分藥本身的生长部位,随叶位下移,逐渐减少,增加对下一级分蘖的供应。主茎和分蘖顶部3片展开叶的同化物均主要供应正在出现的下一级分蘗和其下节位的只有1片展开叶的分蘖,对其他分蘗的供应是随蘖位降低而减少。+3叶以下各叶同化物的输出方向已不是正在出现的分蘗,而是其叶腋着生的上一节位的分蘗。同一叶片在不同叶位时的主要供应部位均是其叶腋着生的上一节位的分蘖。由此可见,叶输出的同化物各有其主要输出方向和供应范围。
The ~ (14) C tracer method was used to study the output direction and supply range of winter wheat assimilates in main stem and two first tillering tillers at winter tillering stage. Main stems and tillers at the top of a leaf expansion (O leaves) the main supply of the main stem and the growing part of the drug itself, with the leaves down, and gradually reduce, increasing the supply of the next level of tillers. The assimilates of the three unfolding leaves on the top of the main stem and the tiller mainly supply the tillering of the emerging next tiller and its lower node only for one expanded leaf and the supply of other tillers as the tillering position decreases. The output of the leaves below the +3 leaves is no longer an emerging tiller, but the tiller of the last node of the leaf axil. The same leaves in different leaf positions when the main supply parts are axillary axons of the previous section of the tiller. Thus, the output of the leaves of the assimilate each have their main output direction and supply range.