刨花楠不同种源主要光响应指标分析  

Analysis of Primary Light-Response Parameters of Machilus pauhoi from Different Provenances

作　　者：钟全林[1] 胡松竹[2] 贺利中 唐承财[1] 

机构地区：[1]福建师范大学地理科学学院,福州350007 [2]江西农业大学园林与艺术学院,南昌330045 [3]江西省永新县七溪岭林场,永新343400

出　　处：《林业科学》2008年第7期118-123,共6页Scientia Silvae Sinicae

基　　金：江西省科技厅重点项目(20031B0204200);福建省科技厅重点项目(2004N010,2005NZ1010);福建省重点学科建设项目(12311009)

摘　　要：Net photosynthetic rates(Pn) were measured in 18-month-old seedlings of Machilus pauhoi from two provenances of Suichuan in Jiangxi and Jian’ou in Fujian using a LiCor LI-6400 portable photosynthesis system(LiCor Inc.,Lincoln,NE,USA) with a LED light source. The other photosynthetic parameters,including maximum net photosynthetic rate(Pmax),apparent quantum yield(AQY),light saturation point(LSP) and light compensation point(LCP),were also detected in response to irradiation. The results showed: The average P max,AQY,LSP and LCP of the seedlings from the two provinces were 12.65 μmolCO2.m -2 s -1,0.052 7 μmolCO2.μmol -1 photons,1 120.99 μmol.m -2 s -1 and 18.03 μmol.m -2 s -1 respectively. There were significant differences between the two provenances in the all photosynthetic parameters except for AQY. The provenance of Suichuan performed better than that from Jian’ou with higher P max,AQY and LSP of 30.48%,4.66% and 25.70% respectively,though the LCP of Suichuan provenance was higher and needed stronger illumination. There was more variation in P max,AQY,LSP and LCP between the two provenances than that within the two provenances. There were significant differences between the upper and lower crown layers with higher P max and AQY in the upper crown,while there was no difference in LCP and LSP between the two crown layers due to the integrated influence of the shape of seedling crowns and the photosensitivity of leaves.Net photosynthetic rates（ Pn ） were measured in 18-month-old seedlings of Machilus pauhoi from two provenances of Suichuan in Jiangxi and Jian＇ ou in Fujian using a LiCor LI-6400 portable photosynthesis system （ LiCor Inc., Lincoln, NE, USA） with a LED light source. The other photosynthetic parameters, including maximum net photosynthetic rate （Pmax）, apparent quantum yield（AQY）, light saturation point（LSP） and light compensation point（LCP）, were also detected in response to irradiation. The results showed： The average Pma~, AQY, LSP and LCP of the seedlings from the two provinces were 12.65 μmolCO2 · m- 2 s-1 , 0.052 7 μmolCO2 · m- 2 s-1 photons, 1 120.99 μmolCO2 · m- 2 s-1 and 18.03 μmolCO2 · m- 2 s-1 respectively. There were significant differences between the two provenances in the all photosynthetic parameters except for AQY. The provenance of Suichuan performed better than that from Jian＇ou with higher Pmax, AQY and LSP of 30.48 % ,4.66 % and 25.70 % respectively, though the LCP of Suichuan provenance was higher and needed stronger illumination. There was more variation in Pmax, AQY, LSP and LCP between the two provenances than that within the two provenances. There were significant differences between the upper and lower crown layers with higher Pmax and AQY in the upper crown, while there was no difference in LCP and LSP between the two crown layers due to the integrated influence of the shape of seedling crowns and the photosensitivity of leaves.

关 键 词：光响应 最大净光合速率 表观量子产额 光饱和点 光补偿点 刨花楠 

分 类 号：S718.43[农业科学—林学]