Leaf Morphological Characteristics of Populus euphratica in Different Canopy and Its Response to Water Stress
Taking three adult P.euphratica as sampling trees,for the sampling strains of similar in the canopy on the vertical direction trisection,take each canopy thing north and south blend leaves four directions as experimental material.Research different canopy leaf morphological characteristics and physiological characteristics under different concentrations of PEG-6000.The results show that because the mature plants from canopy base to the top of the tree on the tree,in turn,lanceolate,ovate,wide oval leaves,three kinds of leaf shape index,leaf area,and there exists a significant difference to nod petiole; Water stress,the first layer of leaves by maintaining the stability of cell membrane to increase the resistance,the second blade through rapid accumulation of proline content to adapt to drought conditions,the third blade by maintaining the stability of the soluble protein content,improve the level of metabolic damage compensate for the water stress ; On the resistance evaluation method for the membership function layer 3 leaf comprehensive resistance is higher than the second leaf blade is greater than the first layer.
Water stressP.euphraticaProlineRelative conductivitySoluble protein
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