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14C‐Partitioning and biomass allocation in common bean (Phaseolus vulgaris L.) under different moisture levels during pod filling

14C‐Partitioning and biomass allocation in common bean (Phaseolus vulgaris L.) under different... Plants modify their carbon allocation as a response to low water availability. The objective of this study was to evaluate, using a 14CO2 pulse‐chase analysis, the effect of moisture restriction on biomass production in common bean plants var. OTI. The plants were maintained with irrigation until the beginning of pods filling; then, three groups were formed, kept at 100%, 75% or 50% field capacity (FC). After 10 days, 14CO2 gas was supplied to the plants for 4 hr. The plants were harvested at 1, 3 and 7 days after applying the label. Ripe fruits imported more than 50% of the total 14C. Particularly, the label presented greater changes in pericarps of stage III of pod development. The fructose concentration doubled that of the glucose and decreased with the pod age; sucrose concentration increased in pericarps in stages III and IV of pod development in relation to those in stage II. The sucrose decrease only in stage II pericarps on day 7, as well as the starch concentration that decreased by half in the 50% FC condition. The latter coincided with the highest amylolytic activity as evaluated in native gels. These findings open new opportunities to research the carbon allocation mechanism under moisture restriction. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Agronomy and Crop Science Wiley

14C‐Partitioning and biomass allocation in common bean (Phaseolus vulgaris L.) under different moisture levels during pod filling

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References (51)

Publisher
Wiley
Copyright
Copyright © 2022 Wiley‐VCH GmbH
ISSN
0931-2250
eISSN
1439-037X
DOI
10.1111/jac.12550
Publisher site
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Abstract

Plants modify their carbon allocation as a response to low water availability. The objective of this study was to evaluate, using a 14CO2 pulse‐chase analysis, the effect of moisture restriction on biomass production in common bean plants var. OTI. The plants were maintained with irrigation until the beginning of pods filling; then, three groups were formed, kept at 100%, 75% or 50% field capacity (FC). After 10 days, 14CO2 gas was supplied to the plants for 4 hr. The plants were harvested at 1, 3 and 7 days after applying the label. Ripe fruits imported more than 50% of the total 14C. Particularly, the label presented greater changes in pericarps of stage III of pod development. The fructose concentration doubled that of the glucose and decreased with the pod age; sucrose concentration increased in pericarps in stages III and IV of pod development in relation to those in stage II. The sucrose decrease only in stage II pericarps on day 7, as well as the starch concentration that decreased by half in the 50% FC condition. The latter coincided with the highest amylolytic activity as evaluated in native gels. These findings open new opportunities to research the carbon allocation mechanism under moisture restriction.

Journal

Journal of Agronomy and Crop Science – Wiley

Published: Dec 1, 2022

Keywords: fruit; hexoses; photoassimilate; seed; starch; sucrose; translocation

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