摘要
比较不同变异类型魔芋的光合特性,为魔芋的遗传改良提供参考。以魔芋叶柄不同颜色变异类型(叶柄颜色分别为黑色、白色、红色和青色,以下以黑杆魔芋、白杆魔芋、红杆魔芋和青杆魔芋代称)为材料,并以白魔芋和‘鄂魔芋1号’为对照,运用Li-6400便携式光合测定仪比较其光合特性差异。结果表明,不同变异类型魔芋的光合能力存在一定差异。魔芋的净光合速率(Pn)日变化曲线呈单峰型和双峰型,黑杆魔芋和白魔芋存在“光合午休”现象,其中黑杆魔芋的Pn日均值最大,红杆魔芋的Pn日均值最小。魔芋的Pn-PAR和Pn-CO_(2)响应曲线变化趋势整体较一致但变化程度有所不同,根据响应曲线求得6份魔芋材料的光饱和点为955~1191μmol/(m^(2)·s),光补偿点为1.51~47.05μmol/(m^(2)·s),表观量子效率为0.0235~0.0415;CO_(2)饱和点为1528~1948μmol/mol,CO_(2)补偿点为35.20~96.67μmol/mol,羧化效率为0.0203~0.0340。‘鄂魔芋1号’、黑杆魔芋和青杆魔芋光合表现更佳。
To compare the photosynthetic characteristics of different variation types of konjac and provide reference for its genetic improvement,different color petioles variation types of Amorphophallus konjac(black,white,red and cyan,referred to as black,white,red and green konjac)were used as materials,A.albus and‘E konjac No.1’as control,to compare their photosynthetic differences using Li-6400 portable photosynthetic apparatus.The results showed that there were some differences in photosynthetic capacity of different konjac materials.Pn-PAR and Pn-CO_(2)response curves of konjac were consistent on the whole,but the degree was different.The light saturation point and light compensation point of the 6 konjac materials were obtained from the response curves ranging from 955 to 1191μmol/(m^(2)·s),and the light compensation point ranged from 1.51 to 47.05μmol/(m^(2)·s).The apparent quantum efficiency ranged from 0.0235 to 0.0415.The CO_(2)saturation point was 1528-1948μmol/mol,the CO_(2)compensation point(CCP)was 35.20-96.67μmol/mol,and the carboxylation efficiency was 0.0203-0.0340.The photosynthetic performances of‘E konjac No.1’,black konjac and green konjac were better.
作者
颜惠芳
王旭军
彭翠英
朱临渊
张小军
杨鹏华
曹受金
YAN Huifang;WANG Xujun;PENG Cuiying;ZHU Linyuan;ZHANG Xiaojun;YANG Penghua;CAO Shoujin(Central South University of Forestry and Technology,Changsha 410004;Hunan Academy of Forestry,Changsha 410004;Xinhua Xiangxin Agricultural Comprehensive Development Co.,Ltd.,Xinhua,Hunan 417600)
出处
《中国农学通报》
2024年第28期17-23,共7页
Chinese Agricultural Science Bulletin
基金
欧洲投资银行贷款项目“杉木人工纯林近自然化改造经营模式研究”(OT-S-KTA2)。
关键词
魔芋
变异类型
光合特性
日变化
响应曲线
Amorphophallus konjac
variation types
photosynthetic characteristics
daily variation
response curve
