蓝莓叶片与抗旱性相关的解剖结构指标研究

Study on leaf anatomical structure indexes related to drought resistance of blueberry

为用叶片解剖结构指标评价蓝莓(Vaccinium spp.)的抗旱性提供科学依据,并为蓝莓抗旱性品种的选育提供便捷有效的方法,测定分析了蓝莓8个品种的7项与抗旱性相关的叶片解剖结构指标,分别为叶片主脉直径、叶片厚度、上表皮厚度、上表皮角质层厚度、栅栏组织厚度、叶片组织结构紧密度和气孔密度。方差分析结果显示,8个品种在每项叶片解剖结构指标上总体差异均为极显著。对各品种进行了两两之间的单因素多重比较,筛选出叶片厚度、上表皮厚度和上表皮角质层厚度3项主要指标,并用隶属函数值法对8个品种的抗旱性大小排序为:园蓝>阳光蓝>梯芙蓝>灿烂>密斯黛>南月>布里吉塔>蓝鸟。

In order to provide scientific basis for using leaf anatomical structure indexes to evaluate drought resistance of blueberry （Vaccinium spp.）, and to provide a convenient and effective method for selecting drought-resistant cultivars of blueberry, 7 leaf anatomical structure indexes related to drought resistance of 8 blueberry cultivars, including diameter of main leaf vein, leaf thickness, top epidermis thickness, thickness of top epidermis cutin, thickness of palisade tissue, leaf tissue structure tense ratio （CTR） and stoma density, were measured and analyzed. The variance analysis showed that differences of each anatomical leaf structure index among the 8 cuhivars were extremely significant. Then the single factor multiple comparisons between two cultivars were calculated. Leaf thickness, top epidermis thickness and thickness of top epidermis cutin were selected to represent drought resistance based on leaf anatomical structure. According to the 3 indexes, an order of drought resistance of the 8 cuhivars was given by using subordinate function values analysis： Gardenblue 〉 Sunshineblue 〉 Tifblue 〉 Brightwell 〉 Misty 〉 Southmoon 〉 Brigitta 〉 Bluejay.