两种匍灯藓属植物夏季和冬季光合特性的比较研究

应用生态学报 ›› 2001, Vol. ›› Issue (1): 39-42.

两种匍灯藓属植物夏季和冬季光合特性的比较研究

刘应迪¹, 陈军¹, 张丽娟¹, 曹同²

1. 吉首大学生命科学与化学学院, 吉首416000;
2. 中国科学院沈阳应用生态研究所, 沈阳110016

收稿日期:1999-10-25 修回日期:1999-12-14 出版日期:2001-01-25
通讯作者: 刘应迪,男,1958年生,博士,副教授,主要从事植物学、植物生理学和生态学的研究和教学,发表论文30篇.Tel:0743-8564416(O),E-mail:ecol@mail.jsu.edu.cn
基金资助:
湖南省教委“八五”重点项目

Photosynthetic characteristics of two plagiomnium mosses in Summer and Winter

LIU Yingdi¹, CHEN Jun¹, ZHANG Lijuan¹, CAO Tong ²

1. College of Life Sciences, Chemistry, Jishou University, Jishou 416000;
2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016

Received:1999-10-25 Revised:1999-12-14 Online:2001-01-25

摘要/Abstract

摘要： 分别对生长于冬季和夏季的五倍子蚜虫冬寄主藓类植物湿地匍灯藓(Plagiomniumacutum(Lindb.)T.Kop.)和侧枝葡灯藓(Plagiomniummaximoviczii(Lindb.)T.Kop.)的净光合速率及其与光照、温度的关系进行了比较研究.结果表明,2种藓类的最大光合能力在夏季分别为12567和9463μmolCO₂·kg^-1DW·s^-1,而在冬季只有58.1和62.1μmolCO₂·kg^-1DW·s^-1;其暗呼吸强度夏季也比冬季显著增强;光补偿点均在20～40μmol·m^-2·s^-1,光饱和点在200～400μmol·m^-2·s^-1之间,夏季比冬季略高.它们在夏季的表观量子效率分别为1535和1559,冬季只有0456和0459.光合最适温度在20～35℃之间,夏季比冬季有所升高.在0～20℃条件下测得的温度系数,在不同季节和不同种类均相似,约在115～123之间.它们对高温和低温都表现出一定的抗性,在-15～-10℃的低温以及40～45℃的高温条件下均能够保持一定的净光合速率.

Abstract: A comparative study on the photosynthetic characteristics of Plagiomnium acuium (Lindb.)T.Kop., P.maximoviozii (Lindb.)T.Kp.,two overwintering host mosses for Chinese gall aphid(Schlechtendalia chinensis),was conducted by using CI-301PS in Summer, Winter.The results showed that the photosynthetic capacity of these two mosses species was 125.67, 94.63μmol CO₂·kg^-1 DW·s^-1 in Summer,and 58.1, 62.1μmol CO₂·kg^-1 DW·s^-1 in Winter,respectively.The dark respiration rates of these two species in Summer significantly exceeded those in Winter.The light complementary point of these two mosses species was in the range from 20 to 40μmol·m^-2·s^-1 ,and light saturated point was from 200 to 400μmol·m^-2·s^-1 ,with higher value in Summer, lower value in Winter.Their apparent quantum yields were 1.535, 1.559 in Summer,but only 0.456, 0.459 in Winter.The optimum temperature for photosynthesis of these two mosses species was 20 to 35℃,also higher in Summer, lower in Winter.No matter which species, growing season,the temperature coefficients(Q₁₀) measured in the range of 0～20℃ were similar,ranging from 1.15 to 1.23.These two moss species could maintain a certain net photosynthesis for 10～30 minutes under temperature stress from -15 to -10℃, from 40 to 45℃.

中图分类号:

刘应迪, 陈军, 张丽娟, 曹同. 两种匍灯藓属植物夏季和冬季光合特性的比较研究[J]. 应用生态学报, 2001, (1): 39-42.

LIU Yingdi, CHEN Jun, ZHANG Lijuan, CAO Tong . Photosynthetic characteristics of two plagiomnium mosses in Summer and Winter[J]. Chinese Journal of Applied Ecology, 2001, (1): 39-42.

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