刨花润楠不同种源光响应曲线分析  

Photosynthetic light response of different Machilus pauhoi provenances

作　　者：周鹏[1,2] 林玮[2] 朱芹 周祥斌[2] 吴林瑛 李萧芹 陈晓阳[2] 

机构地区：[1]广东生态工程职业学院,广东广州510520 [2]华南农业大学林学与风景园林学院/广东省森林植物种质创新与利用重点实验室,广东广州510642 [3]嘉应学院生命科学学院,广东梅州514015

出　　处：《华南农业大学学报》2016年第4期57-62,共6页Journal of South China Agricultural University

基　　金："十二五"国家科技支撑项目(2012BAD01B04);广东省林业科技创新项目(2011KJCX002)

摘　　要：【目的】研究刨花润楠Machilus pauhoi光合作用光响应曲线特征,比较不同种源刨花润楠光合作用的差异,为刨花润楠良种选育与造林提供一定的理论依据。【方法】以福建建瓯种源(MJO)、福建顺昌种源(MSC)、广东乐昌种源(YLC)、广东仁化种源(YRH)、广西灵川种源(GLC)、广西恭城种源(GGC)6个在广东有推广潜力的刨花润楠种源为材料,观测刨花润楠的光响应曲线特征,并计算出其最大净光合速率、光补偿点、光饱和点、表观量子效率及暗呼吸速率等光响应特征参数。【结果】广西恭城种源刨花润楠的最大净光合速率最高,达到了12.20μmol·m^(-2)·s^(-1),而且其光饱和点与光补偿点之间的差值最大,为604.60μmol·m^(-2)·s^(-1),而福建建瓯种源刨花润楠的最大净光合速率最低,仅为5.32μmol·m^(-2)·s^(-1),福建顺昌种源的光补偿点与光饱和点间差值最小。【结论】参试的6个种源刨花润楠中,广西恭城种源的刨花润楠利用弱光、强光能力和对光适应能力最强,光合潜力较大,具有较好的生长潜力;刨花润楠的造林可适度密植或营造混交林。【Objective】To study the characteristics of photosynthetic light response of Machilus pauhoi,investigate the differences in photosynthesis among different M. pauhoi provenances,and provide the theoretical basis for selective breeding and afforestation of M. pauhoi. 【Method】Seeds of six M. pauhoi provenances with widespread potential in Guangdong were collected from Jianou of Fujian Province( MJO),Shunchang of Fujian Province( MSC),Lechang of Guangdong Province( YLC),Renhua of Guangdong Province( YRH),Lingchuan of Guangxi Province( GLC) and Gongcheng of Guangxi Province( GGC). The photosynthetic light response curves of the seedlings were recorded,and light response parameters including maximum net photosynthesis rate( Pnmax),light compensation point( LCP),light saturation point( LSP),apparent quantum yield( AQY),and dark respiration rate( Rd) were calculated.【Result】GGC provenance had the highest Pnmax( 12. 20 μmol·m^(- 2)·s^(- 1)),and the largest difference between LSP and LCP( 604. 60 μmol·m^(- 2)·s^(- 1)). MJO provenance had the lowest Pnmax( 5. 32μmol·m^(- 2)·s^(- 1)). MSC provenance had the smallest difference between LSP and LCP.【Conclusion】Among six provenances,GGC has the best capability of using low light and strong light and have the highest adaptability to light,therefore this provenance has relatively high photosynthetic potential and growth potential. Close planting or mixed planting may be feasible in the afforestation of M. pauhoi.

关 键 词：刨花润楠 种源 光响应曲线 光响应特征参数 

分 类 号：S718.43[农业科学—林学] S792.23