ISSN:
1573-9058
Schlagwort(e):
intercellular CO2 concentration
;
leaf area
;
leaf dry mass
;
Morus alba
;
net photosynthetic rate
;
photosystem 2
;
relative water content
;
stomatal conductance
;
transpiration rate
;
water relations
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract Three-month-old plants of mulberry (Morus alba L. cv. Kanva-2) were subjected to a drought stress by withholding water supply. As the leaf water potential (ΨW) was dropping progressively with the severity of treatment and increasing stress duration, the values of leaf area, dry mass accumulation, total chlorophyll (Chl) content, net photosynthetic rate (PN), stomatal conductance (gs), and transpiration rate (E) were declined. The photosystem 2 (PS2) photochemical efficiency significantly decreased only at a severe stress treatment. The intercellular CO2 concentration (Ci) remained unaltered during a mild stress, yet it increased under moderate and severe stresses. The Ci/gs ratio reflected the mesophyll efficiency during water stress. Rewatering of the plants led to an almost complete recovery of PN, E, and gs, indicating that a short-term stress brings about reversible effects only.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1006919009266
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