Effects of leaf age on internal CO2 transfer conductance and photosynthesis in tree species having different types of shoot phenology
We examined the changes in leaf anatomy and some physiological characteristics during leaf expansion and maturation. Three deciduous tree species having different types of shoot phenology, maple (Acer mono Maxim.; ‘flush’ type), alder (Alnus japonica(Thunb.) Steud.; ‘successive’ type), and Japanese...
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Veröffentlicht in: | Australian journal of plant physiology 2001, Vol.28 (11), p.1075-1084 |
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Sprache: | eng |
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Zusammenfassung: | We examined the changes in leaf anatomy and some physiological characteristics
during leaf expansion and maturation. Three deciduous tree species having
different types of shoot phenology, maple (Acer mono
Maxim.; ‘flush’ type), alder
(Alnus japonica(Thunb.) Steud.; ‘successive’
type), and Japanese poplar (Populus maximowiczii A.
Henry; ‘successive’ type), were studied. Leaf CO
2 assimilation rate at high irradiance
(P max) and CO
2 transfer conductance inside the leaf
(g i) varied significantly with
leaf development. There were strong positive relationships between
P max) and g
i for all of the species. The variations in
g i were partly related to those
in the surface area of chloroplasts facing the intercellular airspaces, while
some other factors that related to liquid phase conductance may also
contribute to the variation in g i
. The developments of mesophyll cells were accompanied by the concomitant
increase in chloroplast and Rubisco content in Alnus and
Populus (successive types). |
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ISSN: | 0310-7841 1445-4408 1446-5655 |
DOI: | 10.1071/pp00102 |