Title

土壤鹽度對欖李苗木葉綠素螢光反應及呼吸作用之影響

Translated Titles

Effects of Soil Salinity on Chlorophyll Fluorescence and Respiration of Mangrove Lumnitzera racemosa Seedlings

DOI

10.7075/TJFS.200209.0323

Authors

范貴珠(Kuei-Chu Fan);許博行(Bor-Hung Sheu);張峻德(Chun-Te Chang)

Key Words

紅樹林 ; 欖李 ; 鹽度 ; 葉綠素螢光反應 ; 呼吸作用 ; mangrove ; Lumnitzera racemosa ; salinity ; chlorophyll fluorescence ; respiration

PublicationName

臺灣林業科學

Volume or Term/Year and Month of Publication

17卷3期(2002 / 09 / 01)

Page #

323 - 335

Content Language

繁體中文

Chinese Abstract

本研究探討不同土壤鹽分濃度對欖李(Lumnitzera racemosa)苗木葉綠素螢光反應及呼吸作用之影響。苗木以0、0.75、1.5及3.0% NaCl四種不同鹽度處理40、55、75及90 d後,以葉綠素螢光分析儀測定其光合活性。結果顯示在處理75及90 d後,0.75及1.5%二處理苗木暗適應後之最大PSⅡ光化學光量子產量(Fv/Fm)及PSⅡ潛在活性(Fv/Fo)明顯較0及3.0%處理者高,表示其葉片PSⅡ光化學活性較高。苗木之光化學淬熄係數(qP)則以0.75、1.5及3.0%三種處理較高,顯示PSⅡ反應中心氧化態之QA比例增加,有利於光合作用之電子傳遞;然3.0%處理苗木之非光化學淬熄係數(qN)明顯較高,而且葉片之光量子產量(Ф11)明顯較低,即PSⅡ反應中心所捕獲之光能,以非光化學反應之熱能散失機會增加。而四種不同鹽度處理苗木150 d後,0、0.75及1.5%三種處理苗木之葉片呼吸作用速率並無顯著差異,但3.0%高鹽度處理者則明顯增加。而苗木根部呼吸作用則以0.75及1.5%二種鹽度處理者較低,0及3.0%高鹽分處理苗木則較高。上述結果可說明欖李苗木在低鹽分濃度下,會有較佳之生長及生理表現。

English Abstract

This study investigated the effect of different salinities on chlorophyll fluorescence and respiration of mangrove Lumnitzera racemosa seedlings. Seedlings were grown in different concentrations of salinity containing 0, 0.75, 1.5, and 3.0% NaCl each for 40, 55, 75, and 90 days. The effects of salinity on photosynthetic activity in seedlings were determined using a pulse amplitude-modulated chlorophyll fluorometer. The quantum yield of PS Ⅱ photochemistry in a dark-adapted state (Fv/Fm) and the potential activity of PS Ⅱ (Fv/Fo) were significantly higher in seedlings grown in both 0.75 and 1.5% NaCl compared to those treated with 0 and 3.0% NaCl after 75 and 90 days of treatment. The photochemical quenching coefficients (qP) were higher with 0.75, 1.5, and 3.0% treatments compared to 0%-treated seedlings, reflecting the capacity of PS Ⅱ reaction centers to compete for the Chl-excited state; it is related to the redox states of QA The non-photochemical fluorescence quenching (qN) of seedlings grown in 3.0% salinity increased and the quantum yield decreased, indicating that the reduction in quantum yield was due to increased heat dissipation. Foliar and root respiration rates were measured in seedlings grown in different salinities for 150 days. Although foliar respiration rates of seedlings grown in 0, 0.75, and 1.5% NaCl treatments did not differ, they significantly increased at 3.0% salinity. Root respiration rates were lower in the 0.75%-and 1.5%-treated seedlings compared to those of 0%-and 3.0%-treated ones. These results explain the better growth and physiological performance of seedlings of L. racemosa when grown in mild salinities.

Topic Category 生物農學 > 農業
生物農學 > 森林
生物農學 > 畜牧
生物農學 > 漁業
Times Cited
  1. 陳高樑(2010)。澎湖青螺濕地栽植紅樹林生長適應性之研究。屏東科技大學森林系所學位論文。2010。1-112。 
  2. 曾怡瑛(2014)。樟樹、臺灣欒樹和鐵冬青苗木在不同容器下各種逆境處理對生長之影響。臺灣大學園藝暨景觀學系學位論文。2014。1-120。 
  3. 楊勝崎(2012)。河岸紅樹林擴張之生態水利模式建立。臺灣大學土木工程學研究所學位論文。2012。1-205。 
  4. 黃校翊(2007)。聖誕紅氮素營養與氮肥診斷之研究。國立臺灣大學園藝學研究所學位論文。2007。1-106。 
  5. 林芊簪(2007)。提高繁星花萃取重金屬鎘栽培方式之探討。臺灣大學園藝學研究所學位論文。2007。1-116。