论文部分内容阅读
通过控水盆栽试验,分别在大豆始花期、始粒期和全生育期进行干旱胁迫,分析干旱胁迫对亚有限大豆品种光合产物分配的影响。结果表明:在不同干旱处理下,叶柄鲜重、叶片鲜重、茎秆鲜重、荚皮鲜重、籽粒鲜重、根鲜重、根瘤鲜重和单株根瘤数均随着干旱胁迫强度加大而下降。在全生育期和始花期干旱胁迫下,地上鲜重占总鲜重的比例随干旱程度的增加而降低,地下鲜重占总鲜重的比例随干旱程度的增加而提高;在始粒期干旱胁迫下,地上鲜重占总鲜重的比例随干旱程度的增加而提高,地下鲜重占总鲜重的比例随干旱程度的增加而降低。随着干旱胁迫程度的提高,叶柄鲜重、叶片鲜重、茎秆鲜重占地上鲜重的比例均提高,根鲜重占地下鲜重的比例提高,而荚皮鲜重和籽粒鲜重占地上鲜重的比例均下降,根瘤鲜重占地下鲜重的比例下降。全生育期和始花期干旱胁迫促进光合产物向地下部分配,而始粒期干旱胁迫促进光合产物向地上部分配。在地上部分,干旱胁迫促进光合产物向叶柄、叶片、茎秆分配,而向荚皮和籽粒分配减少;在地下部分,干旱胁迫促进光合产物向根分配,而向根瘤分配量减少。
The effects of drought stress on photosynthate distribution of sub-limited soybean cultivars were analyzed by pot experiments. The effects of drought stress on the distribution of photosynthate in sub-limited soybean cultivars were analyzed. The results showed that under different drought treatments, fresh weight of petiole, fresh weight of leaves, fresh weight of fresh stems, fresh weight of fresh peel, fresh weight of fresh weight, fresh weight of fresh weight and nodule number per plant were all increased with the increase of drought stress Big and fall. The proportion of above-ground fresh weight to total fresh weight decreased with the increase of drought degree during the whole growth period and the flowering period. The proportion of fresh weight to total fresh weight increased with the increase of drought intensity. During the initial grain-filling stage, Under stress, the proportion of above-ground fresh weight to total fresh weight increased with the increase of the degree of drought, and the proportion of underground fresh weight to total fresh weight decreased with the increase of the degree of drought. With the increase of drought stress, the fresh weight of petiole, fresh weight of leaves, fresh weight of fresh weight of stalks increased, the proportion of fresh weight of fresh weight to underground weight increased, while the fresh weight of fresh weight of peel and fresh weight of grain accounted for The proportion of fresh weight on the ground decreased, and the proportion of fresh weight of fresh nodules to the fresh weight of underground decreased. Drought stress during the whole growth period and flowering stage promoted the distribution of photosynthetic products to the lower part of the soil, while the drought stress at the grain-filling stage promoted the distribution of photosynthetic products to shoots. In the aerial part, drought stress promoted the distribution of photosynthetic products to the petioles, leaves and stems, but decreased the distribution to the pod and kernels. In the underground part, the drought stress promoted the distribution of photosynthate to the roots and the distribution to the nodules.