Drought sress and the distribution of vegetative and reproductive traits of a bean cultivar

By A. Barrios, Gerrit Hoogenboom, D. Nesmith. 2005

92 citations recorded by the source corpus.

Soil water deficits may affect the location and pattern of flower and pod production on different stem axes of a bean plant. The objective of this study was to understand the effect of drought stress on the distribution of flowers and pods on the main stem and on branches of bean plants. The experiment was conducted in a shelter field facility. Water stress was imposed from the end of the vegetative stage to physiological maturity and soil water was measured with a neutron probe every two weeks. Formation of flowers at each node of the main stem was monitored at 44 days after planting (DAP) and formation of pods at 55DAP and 65 DAP. Dry weight of stems and leaves as well leaf area were measured during the middle of the pod filling stage (55DAP). The total number of flowers reached maxima of 32 and 44 flowers per plant for the drought and irrigated treatments, respectively. Number of flowers on branches decreased 50% in the stress treatment when compared to the control. Pod setting was also reduced on the branches of the lower nodes of the main stems. Under drought, the leaf area diminished by 60.1% and 10.4% on branches and main stem, respectively. The field drought conditions of this experiment had a greater effect on the vegetative and reproductive growth of branches as compared to the main stem affecting the final yield.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/c186633145cf5bb2ba868b0fae547e9058a5ad86

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In Plant Science

1. Steve Beebe
2. J. Polanía
3. I. Rao
4. C. Cajiao
5. Lixin Wang
6. S. Daryanto
7. P. Jacinthe
8. M. Rivera

Citations in the corpus

• Selection for Drought Resistance in Dry Bean Landraces and Cultivars (2006, background): “Moderate to severe drought stress reduced biomass and seed yield (from 20 to 90%), harvest index, number of pods and seeds, seed weight, and days to maturity (Nielsen and Nelson, 1998; Nuñez-Barrios et al., 2005; Ramı́rez-Vallejo and Kelly, 1998; Terán and Singh, 2002a).”
• Global synthesis of drought effects on cereal, legume, tuber and root crops production: A review (2017, background): “While the mechanisms of lowering yield differed between drought and heat stress (i.e., drought lowered the amount of assimilates to the sinks (Nuñez Barrios et al., 2005) while heat stress shortened the seed-filling duration), both led to smaller seed size (Prasad et al., 2008).”
• CAN TEPARY BEAN BE A MODEL FOR IMPROVEMENT OF DROUGHT RESISTANCE IN COMMON BEAN (2013, background): “Moderate to severe drought stress in common bean is known to reduce canopy biomass and seed yield, harvest index, number of pods and seeds, seed weight, and days to maturity (Nunez-Barrios et al., 2005; Beebe et al., 2013).”