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在温室培养条件下,分别用根系和叶片Na Cl胁迫对甜土植物枇杷(Eriobotrya japonica)的幼苗进行处理,研究两种盐胁迫方式对其生长、矿质元素(Ca2+、Mg2+、Na+、K+、Cl-)和灰分含量在植物体各器官和叶片不同部位的影响。结果表明:在叶片盐胁迫下枇杷幼苗的叶片病斑较多分布于叶尖、叶缘,在根系盐胁迫下则较多分布于叶片中心区;根系盐胁迫促进枇杷幼苗的灰分含量积累,叶片盐胁迫则影响不大;两种方式盐胁迫枇杷幼苗体内的Na+和Cl-含量都呈极显著的正相关性;两种方式盐胁迫对枇杷幼苗的5种矿质元素含量影响相差不大,但它们影响矿质元素在植物中的重新分布;叶片盐胁迫对枇杷幼苗体内的离子毒害比根系盐胁迫的大。
Under the condition of greenhouse culture, seedlings of Eriobotrya japonica were treated with root and leaf NaCl stress respectively. The effects of two salt stress treatments on their growth, mineral elements (Ca2 +, Mg2 +, Na +, K +, Cl -) and ash content in different parts of plant organs and leaves. The results showed that under salt stress, leaf lesions of loquat seedlings were more distributed in leaf tip and leaf margin, and were more distributed in leaf center under salt stress. Salt stress of root system promoted the accumulation of ash content in loquat seedlings, There was a significant positive correlation between Na + and Cl- content in salt-induced loquat seedlings. Salt stress had little effect on the contents of the five mineral elements in loquat seedlings, They affect the redistribution of mineral elements in plants; leaf salt stress on the loquat seedlings in the ion poisoning than the root of salt stress.