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Influence of Soluble Sugars on Seed Quality in Nodulated Common Bean (Phaseolus vulgaris L.): The Case of Trehalose

^a Depto. de Biotecnología y Bioquímica, Cinvestav-U. Irapuato, Km. 9.6 Libramiento Norte, Carretera Irapuato-León, C.P. 36500, Gto. México
^b Bean Program of INIFAP-Celaya, Km. 6, Carretera, Celaya-San Miguel Allende, Apdo. Postal 112, C.P. 38110 Celaya, Gto. México
^c Instituto de Investigaciones Químico-Biológicas, UMSNH, Ciudad Universitaria, B-3, Morelia, Mich., México

View larger version (23K): [in this window] [in a new window]   Figure 1. Gas chromatography (GC) chromatograms of trehalose spiking assays: (a) chromatogram of a crude ethanolic extract of cultivar ICA Palmar seeds and (b) chromatogram of a similar cultivar ICA Palmar ethanolic extract containing trehalose. Insets: enlargements of areas of trehalose peaks; arrows indicate trehalose peak. *Unknown disaccharide.

View larger version (25K): [in this window] [in a new window]   Figure 2. Gas chromatography (GC) chromatograms of trehalase hydrolysis assays: (a) chromatogram of a crude ethanolic extract of cultivar ICA Palmar seeds and (b) chromatogram of a crude ethanolic extract of cultivar ICA Palmar seeds after treatment with the enzyme trehalase. Insets: enlargements of areas of trehalose peaks; arrows indicate trehalose peak. *Unknown disaccharide.

View larger version (19K): [in this window] [in a new window]   Figure 3. Correlation graphics between trehalose and soluble sugars from common bean (Phaseolis vulgaris L.) seeds obtained from (A) fertilized plants and (B) nodulated plants raised in a growth chamber. Solid lines are the slope of the correlation coefficient; dotted lines are the confidence limits.