Record number :
731155
Title of article :
Psidium guajava ‘Paluma’ (the guava plant) as a new bio-indicator of ozone in the tropics
Author/Authors :
C.M. Furlan، نويسنده , , R.M. Moraes، نويسنده , , P. Bulbovas، نويسنده , , M. Domingos، نويسنده , , A. Salatino، نويسنده , , M.J. Sanz ، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
5
From page :
691
To page :
695
Abstract :
Psidium guajava ‘Paluma’ saplings were exposed to carbon filtered air (CF), ambient non-filtered air (NF), and ambient non-filtered air + 40 ppb ozone (NF + O3) 8 h per day during two months. The AOT40 values at the end of the experiment were 48, 910 and 12 895 ppb h−1, respectively for the three treatments. After 5 days of exposure (AOT40 = 1497 ppb h−1), interveinal red stippling appeared in plants in the NF + O3 chamber. In the NF chamber, symptoms were observed only after 40 days of exposure (AOT40 = 880 ppb h−1). After 60 days, injured leaves per plant corresponded to 86% in NF + O3 and 25% in the NF treatment, and the average leaf area injured was 45% in NF + O3 and 5% in the NF treatment. The extent of leaf area injured (leaf injury index) was explained mainly by the accumulated exposure of ozone (r2 = 0.91; p < 0.05).
Keywords :
Bio-monitoring , Ozone sensitivity , Foliar injury , Psidium , Tropical tree species
Journal title :
ENVIRONMENTAL POLLUTION
Serial Year :
2007
Link To Document :
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