Leaf longevity, construction, and maintenance costs of three mangrove species under field conditions

Title:

Leaf longevity, construction, and maintenance costs of three mangrove species under field conditions

Creator:

Suárez, N.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:0979361b-fdc3-4d68-bc15-ec5349ecb392
uuid:0979361b-fdc3-4d68-bc15-ec5349ecb392
issn:0300-3604
doi:10.1023/B:PHOT.0000015461.36848.c5

Subject:

Avicennia germinans, heat of combustion, Laguncularia racemosa, leaf age, leaf half lifetime, Rhizophora mangle, and salinity

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

This study assessed the effect of leaf age on construction cost (CC) in the mangrove species Avicennia germinans, Laguncularia racemosa, and Rhizophora mangle growing in their natural habitat. Leaf osmolality values were species-specific, the highest in A. germinans (1 693 mmol kg-1) and the lowest in L. racemosa (1 270 mmol kg-1). In the three species, contents of chlorophyll (a+b) (Chla+b) and nitrogen (N) per unit of leaf area were maximal in adult leaves and tended to decline with age. Leaf mass to leaf area ratio (LMA) and ash content increased during leaf ageing. Similarly, as leaves aged, a significant increase in leaf construction cost per leaf area (CCa) was observed, while per leaf mass (CCm) it remained almost constant, suggesting a sustained production of leaf compounds as leaves became older. CC was positively correlated with LMA and heat of combustion (Hc) per leaf area, suggesting differences among species in the quantity and composition of expensive compounds. Leaf half lifetime (t0.5) showed contrasting values in the three mangrove species (60, 111, and 160 d in L. racemosa, R. mangle, and A. germinans, respectively). Overall, L. racemosa was the species with less expensive leaves to construct while leaves of A. germinans and R. mangle had the highest CCm and CCa, respectively. Leaf longevity was positively correlated with the ratio between CC and maximum photosynthetic rate (Pmax), clearly showing the existence of a balance between leaf costs and benefits.

Language:

Multiple languages

Rights:

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

Coverage:

373-381

Source:

Photosynthetica | 2003 Volume:41 | Number:3

Harvested from:

CDK

Metadata only:

false