热研8号坚尼草的光合特性研究

亚热带植物科学 ›› 2007, Vol. 36 ›› Issue (01): 39-42.

热研8号坚尼草的光合特性研究

肖生鸿,刘金祥

湛江师范学院热带草业科学研究所, 广东湛江 524048

收稿日期:2006-10-12 出版日期:2007-03-10 发布日期:2007-03-10
作者简介:肖生鸿(1979-),男,广东惠来人,助理实验师,从事植物生理生态研究。

Studies on Photosynthetic Characteristics of Panicum maximum cv.Reyan No.8

XIAO Sheng-hong, LIU Jin-xiang

Institute of Tropical Pratacultural Science, Zhanjiang Normal College, Zhanjiang 524048, Guangdong China

Received:2006-10-12 Online:2007-03-10 Published:2007-03-10

摘要/Abstract

摘要： 2006年9月上旬,在晴天用LI-6400便携式光合仪测定热研8号坚尼草的光合特性。结果显示,热研8号坚尼草的光合日变化呈"单峰型",无"午休"现象,13:00时出现峰值(Pn为26.9 μmol/m²·s),变化趋势与蒸腾速率(Tr)、气孔导度(Gs)等因子相同;叶片光饱和点(LSP)约为1 700 μmol/m²·s,光补偿点(LCP)约为46 μmol/m²·s,表观量子效率(AQY)为0.0535,CO₂饱和点(CSP)为600 μmol/mol,CO₂补偿点(CCP)为3.49 μmol/mol,羧化效率(CE)为0.1168。表明热研8号坚尼草是一种耐荫的C₄型阳性植物。

关键词: 热研8号坚尼草, 光合特性, 表观量子效率, 羧化效率, C₄阳性植物

Abstract: The photosynthetic characteristics of Panicum maximum cv.Reyan No.8 were measured with the LI-6400 portable photosynthesis system on clear days in the first ten days of September 2006.The results showed that the photosynthesis of P. maximum cv.Reyan No.8 presented a single peak curve, no midday depression.The peak appeared at about 13:00 (Pn=26.9 μmol/m²·s), and changed positively with the variations of transpiration rate and stomatal conductance.The light saturation and compensation points of P. maximum cv.Reyan No.8 were about 1700 μmol/m²·s and 46 μmol/m²·s, respectively.The apparent quantum yield, CO₂ saturation point, CO₂ compensation point and carboxylation efficiency were about 0.0535, 600 μmol/mol, 3.49 μmol/mol and 0.1168, respectively.These results indicated that P. maximum cv.Reyan No.8 was a heliophile C₄ type plant with shade-tolerance.

Key words: Panicum maximum cv.Reyan No.8, photosynthetic characteristics, apparent quantum efficiency, carboxylation efficiency, heliophile C₄ plant

中图分类号:

Q945.11

肖生鸿,刘金祥. 热研8号坚尼草的光合特性研究[J]. 亚热带植物科学, 2007, 36(01): 39-42.

XIAO Sheng-hong, LIU Jin-xiang. Studies on Photosynthetic Characteristics of Panicum maximum cv.Reyan No.8[J]. Subtropical Plant Science, 2007, 36(01): 39-42.

[1]	李冰敏, 卓定龙, 谢伟文, 方必君, 刘晓洲, 谭广文. N素指数施肥对野牡丹幼苗生长和光合特性的影响[J]. 亚热带植物科学, 2023, 52(4): 287-292.
[2]	黄丽英，盘李军，黄永芳，薛克娜，苏木荣，林玮，叶小萍，冼杆标. 不同光强对越南抱茎茶光合及荧光特性日变化的影响[J]. 亚热带植物科学, 2019, 48(03): 237-242.
[3]	许容榕,王卓敏,薛立. 淹水胁迫对3种园林植物幼苗光合特性的影响[J]. 亚热带植物科学, 2017, 46(01): 15-19.
[4]	杨亚慧，黄永芳. 窄叶短柱茶光合特性研究[J]. 亚热带植物科学, 2014, 43(04): 281-285.
[5]	丁君辉,程鹏,王若仲,童建华,洪亚辉. 多效唑和脱落酸对白兰花内源激素及光合速率的影响[J]. 亚热带植物科学, 2012, 41(03): 29-32.
[6]	施建羽. 四季桂光合特性的季节变化研究[J]. 亚热带植物科学, 2010, 39(01): 25-28.
[7]	康龙泉,连张飞,黄珺梅,赖瑞云,钟赞华,谢志南. 不同遮光处理对猫须草生长及光合特性的影响[J]. 亚热带植物科学, 2009, 38(04): 31-33.
[8]	卢毅军,胡中. 三种蜡梅属植物夏冬季光合特性比较[J]. 亚热带植物科学, 2007, 36(04): 20-23.
[9]	李永华,万国辉,叶庆生. 非洲菊光合特性研究[J]. 亚热带植物科学, 2005, 34(01): 14-17.
[10]	刘金祥,邓连芳,刘家琼. 香根草及其伴生种圆果雀稗光合特性比较研究[J]. 亚热带植物科学, 2005, 34(01): 21-24.