Leaf development, gas exchange characteristics, and photorespiratory activity in maize seedlings

Title:

Leaf development, gas exchange characteristics, and photorespiratory activity in maize seedlings

Creator:

Kutschera, U., Pieruschka, R., and Berry, J. A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:6890b753-88d1-4a7c-984f-ac2e393d2fe7
uuid:6890b753-88d1-4a7c-984f-ac2e393d2fe7
issn:0300-3604
doi:10.1007/s11099-010-0079-3

Subject:

botanika, botany, leaf development, maize seedlings, photorespiration, and photosynthesis

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Five decades ago, a novel mode of CO2 assimilation that was later described as C4-photosynthesis was discovered on mature leaves of maize (Zea mays L.) plants. Here we show that 3- to 5-day-old developing maize leaves recapitulate the evolutionary advance from the ancient, inefficient C3 mode of photosynthesis to the C4 pathway, a mechanism for overcoming the wasteful process of photorespiration. Chlorophyll fluorescence measurements documented that photorespiration was high in 3-day-old juvenile primary leaves with non-specialized C3-like leaf anatomy and low in 5-day-old organs with the typical "Kranz-anatomy" of C4 leaves. Photosynthetic gas (CO2)-exchange measurements on 5-day-old leaves revealed the characteristic features of C4 photosynthesis, with a CO2 compensation point close to zero and little inhibition of photosynthesis by the normal oxygen concentration in the air. This indicates a very low photorespiratory activity in contrast to control experiments conducted with mature C3 sunflower (Helianthus annuus L.) leaves, which display a high rate of photorespiration. and U. Kutschera ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

617-622

Source:

Photosynthetica | 2010 Volume:48 | Number:4

Harvested from:

CDK

Metadata only:

false