南京林业大学学报（自然科学版）2017，Vol.41Issue(4)：64-70,7.DOI:10.3969/j.issn.1000-2006.201609014
5个观赏海棠品种光合特性的研究
Study on photosynthetic characteristics of five ornamental crabapple
摘要
Abstract
[Objective] The present study investigated the relationship between the photosynthetic physiology and growth of ornamental crabapples,in order to provide a theoretical basis for effectively introducing and cultivating new varieties of ornamental crabapple with different ligbt-demand characteristics.[Method] The diurnal variation law of photosynthesis and light response curve of 1-year-old specimens from five ornamental crabapple cultivars with various growth speeds (Malus ‘ Candymint',‘ Centurion',‘ Rainbow',‘ Mary Potter',and ‘ Lisa') were measured.[Results] ①Growth rate was significantly positively correlated with the maximum net photosynthetic rate (P),with both growth rate and P increasing as follows:‘ Lisa'＞ ‘ Rainbow'＞ ‘ Mary Potter'＞‘ Centurion'＞ ‘ Candymint'.()Meanwhile,the diurnal variation of ‘Mary Potter'was “bimodal” (i.e.,“midday depression”),which was caused by stomatal limitation,whereas the diurnal variation of the other four varieties was “single peak”.③The light compensation points (PLCP)of different crabapple varieties were higher than 20 μmol/(m2·s),which showed positive plant characteristics.However,theirs light requirement were different,PLCP range was 27-67 μ mol/(m2 ·s),and light saturation point (PLSP) ranged fiom 574 to 976 μmol/(m2 ·s).Among the five cultivars,‘Lisa'possessed a low PLCPand high PLsP,indicating strong adaptability to light conditions,a high growth rate,and the ability to reach a wide range of areas,and ‘Candymint'possessed a high PLCP and low PLSP,indicating relatively weak adaptability to light conditions,a low growth rate,and a narrow range of cultivable areas.[Conclusion] There was a significant positive correlation between the growth index and maximum net photosynthetic rate (P) of the five ornamental crabapple cultivars.We suggest that P can be used as an indicator of the early growth of ornamental crabapples,and to guide the application of breeding varieties of crabapple,production practices and new varieties of breeding.关键词
观赏海棠/光合日变化/光合特性/生长Key words
ornamental crabapple/diurnal variation of photosynthetic/photosynthetic characteristics/growth分类
农业科技引用本文复制引用
武启飞,范俊俊,赵明明,周婷,李千惠,张丹丹,张往祥..5个观赏海棠品种光合特性的研究[J].南京林业大学学报（自然科学版）,2017,41(4):64-70,7.基金项目
江苏省农业科技自主创新项目[CX(14) 2029] （14）
江苏高校优势学科建设工程资助项目(PAPD) （PAPD）
