Partitioning of 14C-photosynthate of leaves in roots, rhizome, and in essential oil and curcumin in turmeric (Curcuma longa L.)

Title:

Partitioning of 14C-photosynthate of leaves in roots, rhizome, and in essential oil and curcumin in turmeric (Curcuma longa L.)

Creator:

Dixit, Deeksha and Srivastava, N. K.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:ec6d321f-fb7c-4ad0-bd05-5985d5a395a7
uuid:ec6d321f-fb7c-4ad0-bd05-5985d5a395a7
issn:0300-3604
doi:10.1023/A:1007262831715

Subject:

amino acids, 14CO2 incorporation, leaf age, organic acids, primary and secondary metabolites, rhizome, root, stem, and sugars

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Incorporation of photosynthetically fixed 14C was studied at different time intervals of 12, 24, and 36 h in various plant parts-leaf 1 to 4 from apex, roots, and rhizome-into primary metabolites-sugars, amino acids, and organic acids, and secondary metabolites-essential oil and curcumin-in turmeric. The youngest leaves were most active in fixing 14C at 24 h. Fixation capacity into primary metabolites decreased with leaf position and time. The primary metabolite levels in leaves were maximal in sugars and organic acids and lowest in amino acids. Roots as well as rhizome received maximum photoassimilate from leaves at 24 h; this declined with time. The maximum metabolite concentrations in the roots and rhizome were high in sugars and organic acids and least in amino acids. 14C incorporation into oil in leaf and into curcumin in rhizome was maximal at 24 h and declined with time. These studies highlight importance of time-dependent translocation of 14C-primary metabolites from leaves to roots and rhizome and their subsequent biosynthesis into secondary metabolite, curcumin, in rhizome. This might be one of factors regulating the secondary metabolite accumulation and rhizome development. and Deeksha Dixit, N. K. Srivastava.

Language:

Multiple languages

Rights:

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

Coverage:

275-280

Source:

Photosynthetica | 2000 Volume:38 | Number:2

Harvested from:

CDK

Metadata only:

false