C-14-Partitioning and biomass allocation in common bean (Phaseolus vulgaris L.) under different moisture levels during pod filling
Por:
Cecilia Morales-Elias, Norma, Martinez-Barajas, Eleazar, Bernal-Gracida, Lilia A., Garcia-Esteva, Antonio, Pena-Valdivia, Cecilia B., Padilla-Chacon, Daniel
Publicada:
1 dic 2022
Ahead of Print:
1 ago 2021
Resumen:
Plants modify their carbon allocation as a response to low water
availability. The objective of this study was to evaluate, using a
(CO2)-C-14 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, (CO2)-C-14 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 C-14. 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.
Filiaciones:
Cecilia Morales-Elias, Norma:
Colegio Postgrad, Programa Posgrad Bot, Montecillo, Mexico
Martinez-Barajas, Eleazar:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Bioquim, Ciudad Univ, Ciudad De Mexico, Mexico
Bernal-Gracida, Lilia A.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Bioquim, Ciudad Univ, Ciudad De Mexico, Mexico
Garcia-Esteva, Antonio:
Colegio Postgrad, Programa Posgrad Bot, Montecillo, Mexico
Pena-Valdivia, Cecilia B.:
Colegio Postgrad, Programa Posgrad Bot, Montecillo, Mexico
Padilla-Chacon, Daniel:
CONACyT Colegio Postgrad, Programs Posgrad Bot, Carretera Mexico Texcoco,Km 36-5, Montecillo 56230, Mexico
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