两种生境下狗牙根叶片结构的比较

Comparison of leaf structure of Bermuda grass grown under two habitats

通过对生长在田园土和植被砼2种生境下的5种狗牙根(Cynodon dactylon)叶片的横切面进行观察,比较了其叶片厚度、上表皮厚度、下表皮厚度和主脉中维管束鞘("花环"结构)的直径。结果表明:除南京狗牙根外,与田园土生境相比,其他4个品种狗牙根在植被砼生境下的叶片厚度都有所增加;除040459/680外,与田园土生境相比,其他4个品种狗牙根在植被砼生境下的叶片上、下表皮厚度都有增加;主脉中"花环"结构直径在2种生境间的变化无明显规律。

Through observing the leaf cross sections of five varieties of Bermuda grass grown in rural area soil and vegetation concrete,the thickness of leaves,upper epidermis and lower epidermis,the diameters of vascular bundle（＂rosette＂ structure）in the main vein of Bermuda grass were compared.The results showed：Except for ＂Nanjing＂ bermudagrass,the thickness of leaves of the other four varieties（＂Common hulled＂,＂Jackpot＂,＂040459/680＂ and ＂Xinnong No.1＂）grown in vegetation were bigger than those grown in rural area soil;Except for ＂040459/680＂ bermudagrass,the thickness of leaf upper epidermis and lower epidermis of the other four varieties grown in vegetation were bigger than those grown in rural area soil;The diameters of vascular bundle（＂rosette＂ structure）in the main vein of five varieties grown under the two habitats varied differently.