淹水胁迫对朴树幼苗形态及生理特性的影响  

Effects of waterlogging stress on the morphological and physiological property of Celtis sinensis

作　　者：王哲宇[1] 童丽丽[2] 汤庚国[1] 

机构地区：[1]南京林业大学森林资源与环境学院,南京210037 [2]金陵科技学院园艺学院

出　　处：《林业科技开发》2013年第4期44-47,共4页China Forestry Science and Technology

基　　金：江苏省科技厅青奥重大项目(编号:SBE201270594);南京六合区科技局重大科技项目(编号:20110107);江苏省"十二五"省重点学科项目(编号:0833城乡规划学);金陵科技学院园林植物团队建设项目;金陵科技学院重点建设学科项目(编号:0834风景园林学)

摘　　要：以朴树1年生幼苗为试验材料,研究淹水胁迫对朴树幼苗形态以及生理生化指标的影响。结果表明,淹水胁迫对朴树幼苗的高生长有抑制作用,而对其地径的增长和不定根的形成具有促进作用;净光合速率受气孔因素影响呈现出先快速下降随后有所上升最后逐渐下降的趋势;整个淹水处理过程中未出现死亡现象,叶形比CK组更圆润,在处理中后期,下部叶片变黄脱落,叶片相对电导率呈先上升后下降的趋势;SOD活性始终保持在较高的水平,POD活性总体呈下降趋势;丙二醛(MDA)含量随淹水时间的持续呈缓慢上升的趋势。因此初步认为朴树幼苗具有一定的抗淹水能力,为较耐水湿树种,可以在地下水位过高和轻度淹水胁迫地区培育,而长期的淹水也会使其受到一定的伤害。Morphological and physiological indicators of 1 -year-old seedlings of Celtis sinensis were investigated in this waterlogging experiment. The resuhs showed, under waterlogging stress, hight growth was inhibited, while basal diameter growth and adventitious root formation was promoted. The net photosynthetic rate, affected by stomatal conductance, showed a rapid decrease followed by an increase in the last gradual downward trend. Waterlogged seedlings did not appear to death. Leaf shape, Compared with CK, was more rounded. Leaf relative conductivity firstly increased and then decreased. SOD activity generally maintained at a high level, while POD activity showed a downward trend. MDA continued to rise slowly over time. Therefore, Celtis sinensis seedlings have a certain degree of anti-waterlogging capacity and could be planted in high ground water level and moderate flooding stress area. However, long-term waterlogging would also make them subject to certain injuries.

关 键 词：朴树 淹水胁迫 光合作用 生理指标 

分 类 号：S792.11[农业科学—林木遗传育种]