Abstract

BRICENO CONTRERAS, Edwin Amir et al. Content of starch in walnut organs (Carya illinoensis Koch) in two phenological stages. Rev. Mex. Cienc. Agríc [online]. 2018, vol.9, n.spe20, pp.4161-4173. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v0i20.987.

The study was carried out in Torreon, Coahuila, with the purpose of analyzing the starch dynamics (mg g-1 MS) and its contribution to the total carbon of the biomass in the perennial organs of the walnut tree (Carya illinoensis Koch) in two phenological stages. The sampling was systematic. The results showed a significant difference in the concentration of starch between root (U= 7, p= 0.007) and trunk (U= 0, p= 0), but not between branches (U=26, p= 0.574) and annual growth (U= 31, p = 0.959). The means of concentration of starch obtained in production were: root= 56.22 mg g-1 MS, trunk= 61.52 mg g-1 MS, branch= 32.76 mg g-1 MS, annual growth= 31.87 mg g-1 MS. In production, the starch was concentrated in trunk (𝑥̅= 86.79 mg g-1 MS), followed by root (𝑥̅= 42.36 mg g-1 MS) and in smaller amount in branch (𝑥̅= 33.08 mg g-1 MS) and annual growth (𝑥̅= 31.85 mg g-1 MS). In dormancy the results were: root (𝑥̅= 70.08 mg g-1 MS), trunk (𝑥̅= 36.26 mg g-1 MS) and in smaller amount in branch (𝑥̅= 32.44 mg g-1 MS) and annual growth (𝑥̅= 31.89 mg g-1 MS). The total carbon contained in the biomass ranges from 42.62 to 43.36%. The contribution of the starch carbon represented from 1.34 to 3.64% with respect to the total biomass of the tree.

Keywords : biomass; cycle of C.; reserves; walnut.

        · abstract in Spanish     · text in English | Spanish     · English ( pdf ) | Spanish ( pdf )