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以“垦农5号”为材料,在盆栽条件下,比较研究了植物生长调节剂SHK-6在干旱胁迫和正常水分条件下对大豆叶片光合作用、同化物运输、抗氧化酶系统以及渗透物质的影响。结果表明(1)SHK-6显著提高干旱条件下叶片水势、Fv/Fm、叶绿素含量和光合速率;同时也显著提高在正常水分条件下叶片光合速率,但对叶片水势、Fv/Fm和叶绿素含量的影响较小。还显著提高了不同水分条件下叶片RuBP羧化酶、PEP羧化酶的活性和SPS的活性。(2)显著提高干旱条件下叶片POD、SOD酶活性,促进叶片游离脯氨酸和可溶性糖积累,降低MDA的含量和减小叶片相对电导率。(3)提高14C同化产物的向外运输,显著增加了同化物在根、根瘤和荚中的积累及同化产物的输出速率。(4)显著提高籽粒、根和根瘤重,而不提高茎和叶的干重。
Under the condition of drought stress and normal moisture, the photosynthesis, assimilate transport, antioxidant enzyme system and osmotic substances of SHK-6 were studied under the conditions of potted cultivation with “Kennong No.5” Impact. The results showed that: (1) SHK-6 significantly increased the leaf water potential, Fv / Fm, chlorophyll content and photosynthetic rate under drought condition, but also significantly increased the leaf photosynthetic rate under normal water conditions, but the leaf water potential, Fv / Fm and chlorophyll content Less affected. The activities of RuBP carboxylase, PEP carboxylase and SPS were significantly increased under different water conditions. (2) The activities of POD and SOD in leaves under drought stress were significantly increased, the accumulation of free proline and soluble sugar, the content of MDA and the relative conductivity of leaves were decreased. (3) Increasing the outward transport of 14C assimilation products significantly increased the accumulation of assimilates in roots, nodules and pods and the rate of assimilation products. (4) Significantly increased the weight of kernels, roots and nodules without increasing stem and leaf dry weight.