植物细胞壁在遭遇逆境后会出现增厚现象，以抵御不良环境。有研究认为这是由于细胞壁内的木质素沉积形成的。目前认为木质素的合成途径不只一条，但苯丙氨酸解氨酶(PAL)和肉桂酸4-羟基化酶(C4H)等酶在合成中起到了十分重要的作用。因此，本试验以野生蒙古扁桃为试验材料，研究干旱胁迫对其在不同生态环境条件下体内PAL和C4H酶活性影响的变化。结果表明：在遭受干旱胁迫时，蒙古扁桃叶内PAL和C4H活性随干旱胁迫程度的增加而逐渐增强，且干旱地区的蒙古扁桃叶内PAL和C4H活性要强于相对不干旱地区。PAL和C4H活性与植物的抗旱性呈正相关关系。
金丽萍
,
崔世茂
,
杜金伟
,
金彩霞
,
吴玉峰
,
其日格
. 干旱胁迫对不同生态条件下蒙古扁桃叶片PAL和C4H活性的影响[J]. 华北农学报, 2009
, 24(5)
: 118
-122
.
DOI: 10.7668/hbnxb.2009.05.025
Plant cell wall in the face of adversity will appear thicker,to withstand the adverse environment.It was a preliminary identification of the cell wall due to the formation of the lignin deposition.At present,the synthesis of lignin that is not only a means,but Phenylalanine Ammonia-Lyase (PAL) and Cinnamic acid 4-Hydroxylase (C4H),such as enzyme in the synthesis played a very important role.As a result,this experiment with wild Prunus mongolia Maxim used to study drought stress in different ecological conditions,the impact of the body of its PAL and C4H activity.The results showed that:when subjected to drought stress,Prunus mongolia Maxim almond leaves with the activity of PAL and C4H drought stress increased gradually increased,and in arid regions in Prunus mongolia Maxim almond leaf PAL and C4H activity than the relatively arid region.PAL and C4H activity and plant drought resistance was positive correlation between.
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