5种樱桃砧木光合特性的初步研究

 以马哈利、大青叶、本溪山樱、吉塞拉5号及考特5种樱桃砧木为试材, 通过气体交换等方法研究了它们的光合特性。结果表明, 马哈利对低浓度CO2及高光强利用能力均强, 光合能力最大; 考特对弱光利用能力显著强于马哈利和吉塞拉5号, 但其光合能力最弱; 5种樱桃砧木新梢中下部、中部、中上部叶面积占新梢总叶面积比率及相应3部分光合产物占总光合产物比率均明显高于基部和顶部所占比率,中下部及中部叶片较大且发育良好, 是整个新梢叶片光合生产力的主要贡献者。

The Preliminary Study on Photosynthetic Characteristics of Five Cherry Rootstocks

The photosynthetic characteristics of five rootstocks of cherry Cerasus mahaleb (L. ) Mill. ,Cerasus pseudocerasus (Lindl. ) G. Don. ‘Daqingye ’, Cerasus sachalinensis Kom. , ‘Gisela 5 ’, and‘Colt’were studied by gas exchange. The results showed that there were differences among photosynthetic capacity, carboxylation efficiency, apparent quantum yield, CO₂ compensation points, CO₂ saturation points, light compensation pionts and light saturation points in the five rootstocks of cherry. The capacities of Cerasus mahaleb L. using low concentration CO₂ and high intensity illumination were high, and photosynthetic capacity was the biggest, though the capacity of using low light of Colt was higher than Cerasusm ahaleb L. and Gisela,the photosynthetic capacity of Colt was the smallest. Photosynthetic capacities were differences among the leaves of different position of the shoots, the proportion of the leaf areas of different position of new shoot in total areas and photosynthetic products in total photosynthetic products were different. The percentage of leaf area in total leaf area and photosynthetic products in total photosynthetic p roducts of the basal-middle, middle and mid2top part leaves was higher than that of the base and top part leaves, the leaves of basal-middle and middlepartswere bigger and developed better, which were the major parts of photosynthetic capacity.