The effect of CO2 enrichment on the growth of nodulated and non-nodulated isogenic types of soybean raised under two nitrogen concentrations

Title:

The effect of CO2 enrichment on the growth of nodulated and non-nodulated isogenic types of soybean raised under two nitrogen concentrations

Creator:

Nakamura, T., Koike, T., Lei, T., Ohashi, K., Shinano, T., and Tadano, T.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:7f9dcef9-120f-47af-b6dc-748e04e531f0
uuid:7f9dcef9-120f-47af-b6dc-748e04e531f0
issb:0300-3604
doi:10.1023/A:1007018929795

Subject:

genetic differences, Glycine max, leaf, net photosynthetic rate, nitrogen accumulation, nitrogen use efficiency, nodule and plant dry mass, stem, and root

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

To find the effects of CO2 enrichment on plant development and photosynthetic capacity of nodulated (line A62-1) and non-nodulated (line A62-2) isogenic lines of soybean (Glycine max Merr.), we examined the interactions among two CO2 treatments (36±3 Pa = AC and 70±5 Pa = EC), and two nitrogen concentrations [0 g(N) m-2(land area) = 0N; 30 g(N) m-2(land area) = 30N]. Nodules were found in both CO2 treatments in 0N of A62-1 where the number and dry mass of nodules increased from AC to EC. While the allocation of dry mass to root and shoot and the amount of N in each organ did not differ between the growth CO2 concentrations, there was larger N allocation to roots in 0N than in 30N for A62-2. The CO2-dependence of net photosynthetic rate (PN) for A62-1 was unaffected by both CO2 and N treatments. In contrast, the CO2-dependence of PN was lower in 0N than in 30N for A62-2, but it was independent of CO2 treatment. PN per unit N content was unaffected by CO2 concentrations. The leaf area of both soybean lines grown in 30N increased in EC. But in 0N, only the nodulated A62-1 showed an increase in leaf area in EC. Nitrogen use efficiency of plants, NUE [(total dry mass of the plant)/(amount of N accumulated in the plant)] in 30N was unaffected by CO2 treatments. In 0N, NUE in EC was lower than in AC in A62-1, and was higher than that at AC in A62-2. Hence, the larger amount and/or rate of N fixation with the increase of the sink-size of symbiotic microorganisms supplied adequate N to the plant under EC. In EC, N deficiency caused the down-regulation of the soybean plant. and T. Nakamura ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

61-70

Source:

Photosynthetica | 1999 Volume:37 | Number:1

Harvested from:

CDK

Metadata only:

false