南京林业大学学报（自然科学版）Issue(4)：19-25,7.DOI:10.3969/j.issn.1000-2006.2015.04.004
不同品种美国山核桃嫁接苗光合特性比较
Photosynthetic characteristics of grafting plants of different pecan varieties
摘要
Abstract
In this study, the photosynthetic efficiency and differences of photosynthetic characteristics among different pecan varieties were evaluated. The photosynthetic characteristics and light response curves of six one⁃year⁃old pecan va⁃rieties, including‘Mahan’ ,‘Pawnee’ ,‘Wichita’ ,‘Stuart’ ,‘Sauber’ and‘Jinhua’ , were measured with LI⁃6400 portable photosynthesis instrument. The results showed that the diurnal variation of net photosynthetic rate ( Pn ) of all these 6 pecan varieties showed asymmetric double peak curve. However, the peak value and the peak time of different varieties, were different. Monthly variation of the net photosynthetic rate of ‘Mahan’, ‘Pawnee’, ‘Wichita’ and‘Stuart’ showed bimodal curve. However, ‘Sauber ’ showed single curve. The maximum net photosynthetic rate (Pn, max) and the light saturation point ( LSP ) of ‘Mahan’ were the largest, 16. 5 and 1 065 μmol/( m2·s), respectively, they were significantly higher than that of the other varieties. While the light compensation( LCP ) was sig⁃nificantly lower than that of the other varieties, indicating that‘Mahan’ had better light adaptation, higher efficiency of using weak light and better shade tolerance. The differences of apparent quantum yield( AQY ) and dark respiration rate ( Rd ) among different pecan varieties were not significant. The photosynthetic capacity of different varieties was‘Mahan’>‘Jinhua’> ‘Pawnee’>‘Wichita’>‘Sauber’>‘Stuart’ . This study showed that there were significant posi⁃tive correlation between Pn, max and LSP . While a significant negative correlation was found between AQY and LCP .关键词
美国山核桃/嫁接苗/光合特性/光响应曲线/相关性分析Key words
Carya illinoensis/grafting plants/photosynthetic characteristics/light response curve/correlation analysis分类
农业科技引用本文复制引用
何海洋,彭方仁,张瑞,徐建南,吴斌,李小飞,苏文川..不同品种美国山核桃嫁接苗光合特性比较[J].南京林业大学学报（自然科学版）,2015,(4):19-25,7.基金项目
国家林业公益性行业科研专项项目（201304711）；江苏省林业三新工程项目［Lysx2014（047）］；江苏高校优势学科建设工程资助项目 （）
