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采用新疆常用的扁桃砧木石头扁桃和桃扁桃的1年生实生苗为材料,研究了不同浓度NaCl对其叶片显微结构的影响。结果表明:(1)两个砧木在75mmol/LNaCl处理10d和20d后叶片结构没有明显变化。(2)石头扁桃在150mmol/LNaCl处理10d后表现出叶肉极显著加厚;栅栏组织细胞和海绵组织细胞显著变长,同时栅栏组织细胞数目增多排列比较紧密。随着盐浓度的增加和胁迫时间的延长也发生了类似的变化,但是栅栏组织细胞和海面组织细胞形状变的很不规则。(3)桃扁桃在300mmol/LNaCl处理10d后才表现出明显反应,栅栏组织细胞和海绵组织细胞变长,栅栏细胞排列紧密且发达。300mmol/LNaCl处理20d后出现类似的变化,但不显著。不同盐浓度间叶肉厚度变化不显著。综合比较发现石头扁桃对NaCl比较敏感,同样时间的NaCl胁迫后,石头扁桃的叶片在150mmol/LNaCl胁迫下变化极显著,而桃扁桃在300mmol/LNaCl胁迫后变化明显;整个处理过程中桃扁桃的叶片结构变化幅度不及石头扁桃。
The perennial seedlings of 1-year-old almonds and peach almonds commonly used in Xinjiang were used as materials to study the effects of different concentrations of NaCl on the leaf microstructure. The results showed that: (1) There was no significant change in the leaf structure of the two rootstocks after treated with 75mmol / L NaCl for 10d and 20d. (2) The stone almond showed extremely thick paddy leaves after treated with 150 mmol / L NaCl for 10 days. The number of palisade tissue cells and spongy tissue cells was significantly longer, and the number of palisade cells increased. Similar changes occurred with the increase of salt concentration and the prolongation of stress time, but the shapes of palisade cells and sea cells became irregular. (3) Peach Almond showed no obvious reaction after treated with 300mmol / L NaCl for 10 days, the cells of palisade tissue and sponge cells became longer and the palisade cells arranged closely and developed. Similar changes occurred after 300 mmol / L NaCl treatment for 20 days, but not significant. There was no significant change in leaf thickness between different salt concentrations. The results showed that Almond was more sensitive to NaCl. After the same time of NaCl stress, the leaf of almond under the stress of 150 mmol / L NaCl had a significant change, while Almond showed obvious changes after 300 mmol / L NaCl stress. During the whole process, Variety of leaf structure less than stone Almond.