Correlation between Ozone Resistance and Relative Chlorophyll Fluorescence or Relative Stomatal Conductance of Bedding Plants

花壇植物的相對葉綠素螢光及相對氣孔導度與其臭氧抗性之關係

張育森(Yu-Sen Chang) ； 俞美如(M.R.Yu)

《Botanical Bulletin of Academia Sinica》 42卷4期 (2001/10) Pp. 265-272

https://doi.org/10.7016/BBAS.200110.0265

摘要

Eight species of bedding plants were exposed to 400 ppb ozone (O3) for 4 h. On the basis of the resulting foliar injury, Madagascar periwinkle (Catharanthus roseus) and impatiens (Impatiens walleriana) were the most resistant to O3, and wax begonia (Begonia xsemperflorens-cultorum) was the most sensitive to O3. Clorophyll fluorescence (Fv/Fm) and stomatal conductance were measured before and after the O3 fumigation. There was a significant regression between, the degree of foliage injury by O3 and relative chlorophyll fluorescence (RCF, ratio of post-fumigation Fv/Fm: pre-fumigation Fv/Fm) or relative stomatal conductance (RSC, ratio of post-fumigation stomatal conductance: pre-fumigation stomatal conductance) (r=-0.84, P＜0.001 and r=0.64, P＜0.05 respectively). That is, species of tested bedding plants that had stronger O3 resistance generally had higher RCF and lower RSC values. It is suggested that RCF and RSC measurements could serve as indicators to screen plants for O3 resistance.

關鍵字

空氣汙染 ； 花壇植物 ； 葉綠素螢光 ； 臭氧抗性 ； 氣孔導度

並列摘要

Eight species of bedding plants were exposed to 400 ppb ozone (O3) for 4 h. On the basis of the resulting foliar injury, Madagascar periwinkle (Catharanthus roseus) and impatiens (Impatiens walleriana) were the most resistant to O3, and wax begonia (Begonia xsemperflorens-cultorum) was the most sensitive to O3. Clorophyll fluorescence (Fv/Fm) and stomatal conductance were measured before and after the O3 fumigation. There was a significant regression between, the degree of foliage injury by O3 and relative chlorophyll fluorescence (RCF, ratio of post-fumigation Fv/Fm: pre-fumigation Fv/Fm) or relative stomatal conductance (RSC, ratio of post-fumigation stomatal conductance: pre-fumigation stomatal conductance) (r=-0.84, P＜0.001 and r=0.64, P＜0.05 respectively). That is, species of tested bedding plants that had stronger O3 resistance generally had higher RCF and lower RSC values. It is suggested that RCF and RSC measurements could serve as indicators to screen plants for O3 resistance.

並列關鍵字

Air pollution ； Bedding plants ； Chlorophyll fluorescence ； Ozone resistance ； Stornatal conductance