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The effects of irradiance on growth, respiration and nitrate reductase activity of Terminalia ivorensis and Terminalia superba
Author(s) -
FASEHUN F. E.
Publication year - 1980
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1980.tb03307.x
Subject(s) - nitrate reductase , irradiance , relative growth rate , shading , respiration , biology , botany , assimilation (phonology) , respiration rate , terminalia , nitrate , growth rate , ecology , art , linguistics , philosophy , physics , geometry , mathematics , quantum mechanics , visual arts
Controlled‐environment experiments were conducted to determine the effect of three irradiance levels obtained by artificial shading (40%, 65% and 100% light) on the growth, distribution of photosynthate, relative growth rate, net assimilation rate, respiration and nitrate reductase activities in the leaves of seedlings of Terminalia ivorensis and Terminalis superba , two important tropical tree species. Total dry weights of both species increased with increasing irradiance level during growth. Shading affected the percentage dry matter in the roots and number of leaves of both species. Relative growth rate, net assimilation rate, respiration and nitrate reductase in the leaves of both species increased with increases in irradiance level during growth. Significant differences between the species were observed in most of the parameters studied.