Carbon partitioning and assimilation as affected by nitrogen deficiency in cassava

Title:

Carbon partitioning and assimilation as affected by nitrogen deficiency in cassava

Creator:

Cruz, J. L., Mosquim, P. R., Pelacani, C. R., Araújo, W. L., and DaMatta, F. M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:676fecf6-e7aa-4d47-aab2-3afa1ebdc6ea
uuid:676fecf6-e7aa-4d47-aab2-3afa1ebdc6ea
issn:0300-3604
doi:10.1023/B:PHOT.0000011952.77340.53

Subject:

invertase, Manihot esculenta, nitrate, photosynthesis, saccharide, and sucrose synthase

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Plants of cassava (Manihot esculenta Crantz) were raised in a sand root medium watered with nutrient solutions, under greenhouse conditions. As the N-supply increased, shoot dry mass was enhanced to a greater extent than root dry mass, thus leading to an increased shoot to root ratio. In leaves, contents of total soluble saccharides, non-reducing saccharides, and inorganic phosphate increased linearly with increasing N-supply. An opposite response was found for reducing saccharides and starch. In general, content of non-reducing saccharides was considerably greater than starch content. Activity of sucrose synthase was not detected, regardless of the N-treatments; by contrast, activity of neutral and acid invertases increased with increasing N-availability. Roots accumulated more total soluble saccharides, but less reducing saccharides and starch, as the N-supply increased. Photosynthetic rates decreased with increasing N-deficiency. Such a decrease was circumstantially associated to reducing saccharide, but not starch, accumulation. Results suggest a limited capacity for carbon export from source leaves under N-limitation. and J. L. Cruz ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

201-207

Source:

Photosynthetica | 2003 Volume:41 | Number:2

Harvested from:

CDK

Metadata only:

false