Leaf senescence patterns and photosynthesis in four leaf flushes of two deciduous oak (Quercus) species

Title:

Leaf senescence patterns and photosynthesis in four leaf flushes of two deciduous oak (Quercus) species

Creator:

Tobiáš, D.J., Ikemoto, A., and Nishimura, T.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:aa50aa65-29ca-43c2-925f-89f5779c7759
uuid:aa50aa65-29ca-43c2-925f-89f5779c7759
urnnbn:urn:nbn:cz:aba007-000fnp

Subject:

chlorophyll, leaf area, leaf duration, leaf number, net photosynthetic rate, Quercus acutissima, and Quercus serrata

Type:

model:internalpart and TEXT

Format:

print

Description:

Changes in chlorophyll (Chl) a+b and a/b, senescence patterns during Chl loss and changes in net photosynthetic rate (P^) of four leaf flushes in Quercus acutissima and Q. serrata were studied. Emergent current-year leaves were classified according to the order of shoot growth flushes (first to fourth flush groups). Senescence patterns showed that leaf fall started from the leaf cohorts of the first flush group (the "oldest" leaf cohorts) which cuhninated upwards to the fourth leaf flush group (the "yoímgest" leaf cohorts). Senescence during Chl loss was accompanied by a decline in Pf^. A strong influence by the leaf flushing phenomenon on senescence was found which limited leaf bearing period and duration of Having large total leaf area and moderately long duration, tiie third and second leaf flush groups reflected the highest photosynthetic potential. This may be a positive attribute since the duration by which these plants maximize the use of its assimilatory organs is an important factor for their carbon fixation.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

231-239 and 73-81

Source:

Photosynthetica | 1995 Volume:31 | Number:2

Harvested from:

CDK

Metadata only:

false