Gas exchange in olive fruit

Title:

Gas exchange in olive fruit

Creator:

Proietti, P., Famiani, F., and Tombesi, A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:ab98e336-206c-40aa-a156-3fdf5ec5368f
uuid:ab98e336-206c-40aa-a156-3fdf5ec5368f
issn:0300-3604
doi:10.1023/A:1007028220042

Subject:

chlorophyll, fruit growth, gross photosynthetic rate, irradiance response curve, Olea europaea L., olive oil, respiration rate, saccharides, stomatal conductance, and transpiration rate

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Dry matter (DM) of olive fruit (cv. Leccino) constantly increased from fruit-set (mid-June) to the end of October. The oil content increased rapidly from the beginning of August, about 40-50 d after full bloom (AFB), to the end of October. As the oil content increased, the saccharide content decreased. On a DM basis, fruit dark respiration rate (RD) and stomatal conductance (Gs) were high soon after fruit-set, then strongly decreased. Gross photosynthetic rate (PG) in full sunlight was high in the first 3 weeks after fruit-set, when the chlorophyll (Chl) content and the ratio between fruit surface area and volume were high, then it progressively decreased. The fruit intercellular CO2 concentration (Ci) was always relatively high, particularly from September onwards. The PG increased following the increase of irradiance (I). The daily PG trend was similar to the I and temperature trends, showing the maximum values at 14:00 h. For a large part of the fruit growing period, during daylight, the CO2 intake by a fruit permitted the reassimilation of a large part (40-80%) of the CO2 produced by RD. The stomata in the first stages of fruit growth were oval and surrounded by guard cells, two months later they lost their shape and were covered by wax. The reduction in fruit PG during fruit growth could be connected to the reduction of the ratio between fruit surface area and fruit volume and the cellular differentiation, whereas the constant high Ci seems to exclude the influence of Gs decrease. Even if olive fruit is highly heterotrophic organ, its photosynthesis can considerably reduce the use of assimilates for respiration and favour fruit maintenance and growth. and P. Proietti, F. Famiani, A. Tombesi.

Language:

Multiple languages

Rights:

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

Coverage:

423-432

Source:

Photosynthetica | 1999 Volume:36 | Number:3

Harvested from:

CDK

Metadata only:

false