Effect of panicle removal on photosynthetic acclimation under elevated CO2 in rice

Title:

Effect of panicle removal on photosynthetic acclimation under elevated CO2 in rice

Creator:

Shimono, H., Suzuki, K., Aoki, K., Hasegawa, T., and Okada, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:1c086d37-a5c1-42c7-94bf-f2eedcc380c1
uuid:1c086d37-a5c1-42c7-94bf-f2eedcc380c1
issn:0300-3604
doi:10.1007/s11099-010-0070-z

Subject:

botanika, botany, acclimation, allocation, elevated CO2, photosynthesis, rice, and senescence

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

To examine the role of sink size on photosynthetic acclimation under elevated atmospheric CO2 concentrations ([CO2]), we tested the effects of panicle-removal (PR) treatment on photosynthesis in rice (Oryza sativa L.). Rice was grown at two [CO2] levels (ambient and ambient + 200 μmol mol-1) throughout the growing season, and at full-heading stage, at half the plants, a sink-limitation treatment was imposed by the removal of the panicles. The PR treatment alleviated the reduction of green leaf area, the contents of chlorophyll (Chl) and Rubisco after the full-heading stage, suggesting delay of senescence. Nonetheless, elevated [CO2] decreased photosynthesis (measured at current [CO2]) of plants exposed to the PR treatment. No significant [CO2] × PR interaction on photosynthesis was observed. The decrease of photosynthesis by elevated [CO2] of plants was associated with decreased leaf Rubisco content and N content. Leaf glucose content was increased by the PR treatment and also by elevated [CO2]. In conclusion, a sink-limitation in rice improved N status in the leaves, but this did not prevent the photosynthetic down-regulation under elevated [CO2]. and H. Shimono ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

530-536

Source:

Photosynthetica | 2010 Volume:48 | Number:4

Harvested from:

CDK

Metadata only:

false