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对抗旱性强弱不同的美味猕猴桃[Actinidia deliciosa(A.Chev.)C.F.Liang et.A.R.Ferguson]品系的组织学与生理生化特性的研究结果表明,抗旱性强的品系叶片表皮蜡质颗粒致密,分布密度大;表皮毛的簇数和每簇毛数较多,茸毛密度大;栅栏组织较厚,但叶片表皮毛长度、表皮细胞大小及海绵组织厚度与抗旱性弱的品系均无显著差异,在干旱条件下,抗旱性强品系的束缚水/自由水比值和过氧化氢酶与过氧化物酶的活性都比抗旱性弱的品系高,且蒸腾强度与叶片萎蔫系数较低,光合强度较高,叶片电导率增加较少,而植株丙二醛、脯氨酸和脱落酸的变化在两品系间无显著的差异。
The results of histological and physio-biochemical studies on Actinidia deliciosa (A.Chev.) CFLiang et.ARFerguson strain showed that the wax grains in the leaves of the drought- The number of epidermal hairs was larger and the number of hairs per cluster was larger; the density of hairs was larger; the palisade tissue was thicker, but there was no significant difference in the length of epidermal hairs, the size of epidermal cells, the thickness of sponge and the weak drought- Under drought conditions, the ratio of irreducible water to free water and the activities of catalase and peroxidase in drought-resistant lines were higher than those in lines with weak drought resistance, and the coefficients of transpiration and leaf wilting were lower, High, leaf conductivity increased less, while the plant malondialdehyde, proline and abscisic acid changes in the two lines no significant difference.