RT Journal Article
SR Electronic
A1 Cayón, M.G.
A1 El-Sharkawy, M.A.
A1 Cadavid, L.F.
T1 Leaf gas exchange of cassava as affected by quality of planting material and water stress
JF Photosynthetica
YR 1997
VO 34
IS 13
SP 409
OP 418
DO 10.1023/A:1006868219162
UL https://ps.ueb.cas.cz/artkey/phs-199713-0009.php
AB Field trial was conducted to study the effects of quality of planting material and prolonged water stress on leaf gas exchange of the cassava (Manihot esculenta Crantz) cultivar M Col 1684. Nutrient contents of planting material affected rootlet formation, but not leaf gas exchange. Net photosynthetic rate (PN), stomatal conductance (gs), and intercellular CO2 concentration (Ci) were significantly reduced by prolonged water stress. New leaves developed after recovery from water stress showed higher PN and gs, as compared to leaves of similar ages of unstressed plants. The higher PN was associated with higher leaf nutrient contents, indicating that photosynthetic capacity was enhanced in these leaves. These compensating characteristics may partly explain the small yield reduction often observed in stressed cassava.