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本研究以马铃薯为试材通过田间试验和叶绿素、光合速率、生物学产量和经济产量、淀粉含量测定及地上茎叶形态解剖电子显微镜观察,发现多效唑(Multi—Effect Triazole,简称MET)促进马铃薯块茎膨大和增加经济产量的主要生理原因有二:一是多效唑提高了叶绿素含量,增强了叶片的光合速率;二是多效唑改变了光合产物在植株器官间的分配比例,减少了营养体对有机养分的消耗,增加了有机养分在块茎中的积累,起了“控上促下”的作用。同时,电镜扫描还表明,多效唑使马铃薯植株伸长受到控制的原因,从组织结构分析是由于细胞体积变小,排列紧密和层数增多,细胞纵向生长受到抑制,从而提高了抗倒能力。此外,马铃薯使用多效唑,对块茎的淀粉含量未发现有明显影响。
In this study, field experiments and photosynthesis of chlorophyll, photosynthetic rate, biological yield and economic yield, starch content and morphological and ultrastructure of stems and leaves of potatoes were used to study the effects of multi-effect triazole (MET) on potato tubers There are two main physiological reasons for the increase and increase of economic yield: Paclobutrazol increased chlorophyll content and enhanced the photosynthetic rate of leaf; secondly, paclobutrazol changed the distribution ratio of photosynthate in plant organs and decreased the effect of nutrient on organic nutrient Consumption, increase the accumulation of organic nutrients in the tubers, played a “control on the promotion of” the role. At the same time, scanning electron microscopy also showed that paclobutrazol causes potato plant elongation to be controlled. The analysis of the tissue structure is due to the fact that paclitaxel can reduce the volume of the cells, arrange closely and increase the number of layers, and inhibit the growth of cells in the longitudinal direction. In addition, the use of paclobutrazol in potato showed no significant effect on the starch content of tubers.