生长季油松针叶叶绿素荧光对温度变化的响应

陈曦; 陈彬丽; 周晨; 郑彩霞

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生长季油松针叶叶绿素荧光对温度变化的响应

陈曦, 陈彬丽, 周晨, 郑彩霞

文章导航 > 北京林业大学学报 > 2011 > 33(6): 70-74

陈曦, 陈彬丽, 周晨, 郑彩霞. 生长季油松针叶叶绿素荧光对温度变化的响应[J]. 北京林业大学学报, 2011, 33(6): 70-74.

引用本文:

陈曦, 陈彬丽, 周晨, 郑彩霞. 生长季油松针叶叶绿素荧光对温度变化的响应[J]. 北京林业大学学报, 2011, 33(6): 70-74.

CHEN Xi, CHEN Bin-li, ZHOU Chen, ZHENG Cai-xia. Response of chlorophyll fluorescence of Pinus tabulaeformis Carr. needles in growing seasons to temperature changes.[J]. Journal of Beijing Forestry University, 2011, 33(6): 70-74.

Citation:

CHEN Xi, CHEN Bin-li, ZHOU Chen, ZHENG Cai-xia. Response of chlorophyll fluorescence of Pinus tabulaeformis Carr. needles in growing seasons to temperature changes.[J]. Journal of Beijing Forestry University, 2011, 33(6): 70-74.

生长季油松针叶叶绿素荧光对温度变化的响应

1.
北京林业大学生物科学与技术学院

Response of chlorophyll fluorescence of Pinus tabulaeformis Carr. needles in growing seasons to temperature changes.

1.
College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083, P. R. China.

摘要: 针对华北地区常绿树种油松耐严寒酷暑的特性，测定生长季针叶叶绿素荧光随短时温度胁迫的变化规律，以探讨油松光合机构对异常温度波动的响应特性。结果显示：在30 和35 ℃常见高温下，随温度升高，初始荧光(F0)、非光化学淬灭系数(qN)逐渐上升，最大光化学效率(Fv/Fm)、最大量子产额(Yield)、电子传递速率(ETR)逐渐下降，变化的幅度较平稳，表明夏季常见高温可影响油松针叶PSⅡ的活性，但造成的损伤不大；而40 ℃以上的高温胁迫，F0、qN上升与Yield、ETR下降的幅度明显增大，Fv/Fm降低到0.8以下，表明针叶的光合机构受损严重。在零上低温(0~15 ℃范围)胁迫下，随温度降低各参数变化不明显，表明生长季油松PSⅡ对零上低温的扰动较稳定；零下低温胁迫时，Fv/Fm、ETR、Yield、qN急剧下降，F0显著上升，且这种损伤是不可恢复的，表明油松PSⅡ在生长季对零下低温是敏感的。
- 油松 /
- 生长季针叶 /
- 温度胁迫 /
- 叶绿素荧光
Abstract: Pinus tabulaeformis Carr. is a species of evergreen plants with the characteristics of heat and cold resistance in north China. The changing patterns of its needles chlorophyll fluorescence parameters after various temperatures were investigated in order to find out how the needles photosynthetic institution respond to unusual temperatures. The data showed that when needles were subjected to 30 and 35 ℃, the minimal fluorescence (F0) and the nonphotochemical quenching coefficient (qN) increased by degrees, while the maximal quantum yield of PSⅡ(Fv/Fm), the maximum quanta yield (Yield), and the electron transport rate (ETR) decreased gradually as the temperature went up. Whereas, all the data varied within a small range, indicating that common high temperature in summer had effects on the PSⅡ reaction centre activity, but cause slight damage. However, when dealt with over 40 ℃ high temperatures, F0, qN ascended and Yield, ETR descended sharply, meanwhile, Fv/Fm reduced to the value below 08. This suggested that the PSⅡ reaction centre might have suffered severe damage. When subjected to low temperatures above zero (ranged from 0 to 15 ℃), parameters didnt have notable changes. That is to say, PSⅡ reaction centres activity of the needles in growing seasons can be stable to the above freezing temperatures influence. Under subzero temperatures, Fv/Fm, ETR and qN decreased considerably while F0 increased visibly, and didnt have significant recovery in the next 12 hours, which implied that subzero temperatures have done irreversible harm to the photosynthetic institution of P. tabulaeformiss needles.
- Pinus tabulaeformis Carr. /
- needles in growing seasons /
- temperature stress /
- chlorophyll fluorescence

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生长季油松针叶叶绿素荧光对温度变化的响应

1. 北京林业大学生物科学与技术学院

收稿日期: 1900-01-01
修回日期: 1900-01-01
刊出日期: 2011-11-30

关键词:

油松 /

生长季针叶 /

温度胁迫 /

叶绿素荧光

摘要: 针对华北地区常绿树种油松耐严寒酷暑的特性，测定生长季针叶叶绿素荧光随短时温度胁迫的变化规律，以探讨油松光合机构对异常温度波动的响应特性。结果显示：在30 和35 ℃常见高温下，随温度升高，初始荧光(F0)、非光化学淬灭系数(qN)逐渐上升，最大光化学效率(Fv/Fm)、最大量子产额(Yield)、电子传递速率(ETR)逐渐下降，变化的幅度较平稳，表明夏季常见高温可影响油松针叶PSⅡ的活性，但造成的损伤不大；而40 ℃以上的高温胁迫，F0、qN上升与Yield、ETR下降的幅度明显增大，Fv/Fm降低到0.8以下，表明针叶的光合机构受损严重。在零上低温(0~15 ℃范围)胁迫下，随温度降低各参数变化不明显，表明生长季油松PSⅡ对零上低温的扰动较稳定；零下低温胁迫时，Fv/Fm、ETR、Yield、qN急剧下降，F0显著上升，且这种损伤是不可恢复的，表明油松PSⅡ在生长季对零下低温是敏感的。

English Abstract

Response of chlorophyll fluorescence of Pinus tabulaeformis Carr. needles in growing seasons to temperature changes.

1. College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083, P. R. China.

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2011-11-30

Keywords:

Abstract: Pinus tabulaeformis Carr. is a species of evergreen plants with the characteristics of heat and cold resistance in north China. The changing patterns of its needles chlorophyll fluorescence parameters after various temperatures were investigated in order to find out how the needles photosynthetic institution respond to unusual temperatures. The data showed that when needles were subjected to 30 and 35 ℃, the minimal fluorescence (F0) and the nonphotochemical quenching coefficient (qN) increased by degrees, while the maximal quantum yield of PSⅡ(Fv/Fm), the maximum quanta yield (Yield), and the electron transport rate (ETR) decreased gradually as the temperature went up. Whereas, all the data varied within a small range, indicating that common high temperature in summer had effects on the PSⅡ reaction centre activity, but cause slight damage. However, when dealt with over 40 ℃ high temperatures, F0, qN ascended and Yield, ETR descended sharply, meanwhile, Fv/Fm reduced to the value below 08. This suggested that the PSⅡ reaction centre might have suffered severe damage. When subjected to low temperatures above zero (ranged from 0 to 15 ℃), parameters didnt have notable changes. That is to say, PSⅡ reaction centres activity of the needles in growing seasons can be stable to the above freezing temperatures influence. Under subzero temperatures, Fv/Fm, ETR and qN decreased considerably while F0 increased visibly, and didnt have significant recovery in the next 12 hours, which implied that subzero temperatures have done irreversible harm to the photosynthetic institution of P. tabulaeformiss needles.

陈曦, 陈彬丽, 周晨, 郑彩霞. 生长季油松针叶叶绿素荧光对温度变化的响应[J]. 北京林业大学学报, 2011, 33(6): 70-74.

引用本文:

陈曦, 陈彬丽, 周晨, 郑彩霞. 生长季油松针叶叶绿素荧光对温度变化的响应[J]. 北京林业大学学报, 2011, 33(6): 70-74.

Citation: