Variable responses of mesophyll conductance to substomatal carbon dioxide concentration in common bean and soybean

Title:

Variable responses of mesophyll conductance to substomatal carbon dioxide concentration in common bean and soybean

Creator:

Bunce, J. A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:7494ef65-99d1-4780-bc0e-69474befa2bf
uuid:7494ef65-99d1-4780-bc0e-69474befa2bf
issn:0300-3604
doi:10.1007/s11099-010-0067-7

Subject:

botanika, botany, Glycine max, light, Phaseolus vulgaris, and temperature

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Some reports indicate that mesophyll conductance (gm) to carbon dioxide varies greatly with the substomatal carbon dioxide concentration (Ci) during the measurement, while other reports indicate little or no change in g m with Ci. I used the oxygen sensitivity of photosynthesis to determine the response of gm to Ci over the range of about 100 to 300 μmol mol-1 Ci at constant temperature in common bean (Phaseolus vulgaris) and soybean (Glycine max) grown over a range of temperatures and photosynthetic photon flux densities (PPFD). In soybean grown and measured at high PPFD there was only a slight, approximately 15% decrease in gm with Ci over the range of 100 to 300 μmol mol-1. With lower PPFD during the measurement of gm, and especially with low PPFD during plant growth, there was a larger decrease in gm with Ci in soybean. In common bean, the same range in Ci resulted in about a 60% decrease in g m for plants grown and measured at high PPFD, with an even larger decrease for plants at low growth or measurement PPFD. Growth temperatures of 20 to 30°C had little influence on the response of gm to Ci or its absolute value in either species. It is concluded that these two species differed substantially in the sensitivity of gm to Ci, and that PPFD but not temperature during leaf development strongly affected the response of gm to Ci. and J. A. Bunce.

Language:

Multiple languages

Rights:

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

Coverage:

507-512

Source:

Photosynthetica | 2010 Volume:48 | Number:4

Harvested from:

CDK

Metadata only:

false