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PP_(333)能有效地抑制番茄幼苗茎的延伸生长和叶面积扩大,使叶片增厚,壮苗指数增大,干物质向根系分配增多,气孔密度和叶绿素含量增加,光合和呼吸增强,根系活力和秧苗抗寒性提高。随着PP_(333)浓度增大,对生长抑制作用增强,后效加长,250μg/mL以上对产量极为不利,50,150μg/mL处理秧苗健壮,生理素质好,产量与CK差异不大。
PP_ (333) could effectively inhibit the stem elongation and leaf area of tomato seedlings, thicken the leaves, increase the seedling index, increase the distribution of dry matter to the roots, increase stomatal density and chlorophyll content, and increase photosynthesis and respiration, Vigor and raise the cold resistance of seedlings. With the increase of PP 333 concentration, the growth inhibition was enhanced. After the increase of the concentration of 250 mg / mL, the yield was extremely unfavorable. The seedling of 50 and 150 μg / mL was strong and the physiological quality was good.