Effect of Water Stress Imposed at Different Growth and Development Stages on Morphological Traits and Yield of Bambara Groundnuts (Vigna subterranea L. Verdc)

Vurayai, R.; Emongor, V.E.; Moseki, B.

doi:10.3923/ajpp.2011.17.27

Cited by 68 publications

(64 citation statements)

References 9 publications

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“…Rajababu et al (2011) reported that with moisture deficit conditions dry matter production and root to shoot ratio were highly effected in groundnut while decreased biomass of almost all genotypes of sunflower (Tahir and Mehid 2001). In Bambara groundnuts, Vurayai et al (2011) observed that shoot: root ratio was significantly reduced by water stress imposed at vegetative, flowering and pod filling stages.…”

Section: Effect Of Drought Stress On Dry Matter Accumulation and Partmentioning

confidence: 98%

Genotypic variability in physiological, biomass and yield response to drought stress in pigeonpea

Vanaja

Maheswari

Sathish

et al. 2015

Physiol Mol Biol Plants

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Three pigeonpea (Cajanus cajan L. Millsp.) genotypes-GT-1, AKP-1 and PRG-158 with varying crop duration, growth habit and flowering pattern were evaluated for variability in their response for drought stress. Drought stress was imposed at initiation of flowering and the observations on biomass and seed yield parameters were recorded at harvest. The magnitude of response of individual component to drought stress was found to be genotype specific. Drought stress significantly decreased photosynthetic rate (P N ), transpiration rate (Tr) and relative water content (RWC) in all the genotypes, however the magnitude of reduction differed with genotype. With drought stress, the reduction of P N was highest in GT-1 while reduction in Tr was highest in PRG-158. The genotype AKP-1, accumulated significantly higher concentrations of osmotic solutes especially proline under water deficit stress, this facilitated it to maintain higher relative water content (RWC) and lower malondialdehyde (MDA) content as compared to other genotypes. Drought stress also impacted biomass production and their partitioning to vegetative and reproductive components at harvest. There was significant variability between the genotypes for seed yield under drought stress while it was non-significant under wellwatered condition. Drought stress enhanced flower drop and decreased flower to pod conversion resulting in reduced pod number and seed number in PRG-158 and GT-1. The genotype AKP-1 recorded superior performance for seed yield under stress environment due to its ability in maintaining pod and seed number as well as improved test weight (100 seed weight). Under drought stress, significant positive association of seed yield with proline, seed number, pod number and test weight clearly indicating their role in drought tolerance.

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Section: Effect Of Drought Stress On Dry Matter Accumulation and Partmentioning

confidence: 98%

Genotypic variability in physiological, biomass and yield response to drought stress in pigeonpea

Vanaja

Maheswari

Sathish

et al. 2015

Physiol Mol Biol Plants

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“…These include drought escape (Vurayai et al, 2011; and avoidance mechanisms (Jorgensen et al, 2010;Vurayai et al, 2011;. There is scant information on accumulation of plant metabolites in bambara groundnut in response to drought.…”

Section: Introductionmentioning

confidence: 99%

“…Plants accumulate a range of osmotically-active metabolites under water stress, including total soluble sugars and proline, in order to maintain water relations under osmotic stress (Nazarli and Faraji, 2011). Vurayai et al (2011) andZondi (2013) showed that proline was higher in water-stressed plants than in non-stressed plants, indicating that proline plays a role in drought tolerance of bambara groundnut. There is, however, no information in the literature on accumulation of soluble sugars in bambara groundnut during water stress, or on the plant's antioxidant defence systems in response to water stress at the seedling stage.…”

Section: Introductionmentioning

confidence: 99%

Water use characteristics of a bambara groundnut (<i>Vigna subterranea</i> L. Verdc) landrace during seedling establishment

Chibarabada¹,

Modi²,

Mabhaudhi³

2015

WSA

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Bambara groundnut is slow to establish and this has negative implications for total water use. Consideration of bambara groundnut as a water-efficient crop for dry areas will benefit from an understanding of water use efficiency and water use characteristics during establishment. We investigated whether there is an association between seed-coat colour of bambara groundnut seeds and water use efficiency. A secondary objective was to determine physiological and metabolic responses of bambara groundnut to terminal water stress during seedling establishment. Bambara groundnut seedlings showed reduced seedling canopy growth, increased root length and root: shoot ratio, as well as increased total soluble sugars and tissue water potential with decreasing water availability -traits associated with drought avoidance mechanisms. Consequently, seedling water use efficiency improved with decreasing water availability. Acclimation to water stress was observed under terminal stress; previously stressed seedlings responded better than previously non-stressed seedlings. Dark-coloured seeds had higher levels of phenolics which may have led to their enhanced performance during seedling emergence as well as improved drought tolerance and seedling WUE.

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“…The growth responses of bambara groundnut to water stress have been described in several instances, using growth indices such as plant height, leaf area index and total dry matter (Collinson et al, 1996(Collinson et al, , 1997(Collinson et al, , 1999Mwale et al, 2007;Vurayai et al, 2011aVurayai et al, , 2011bMabhaudhi and Modi, 2013). However, most of this research has been done under controlled environments (Sesay et al, 2010) and field conditions (Mabhaudhi and Modi, 2013) where quantifying water was not the major objective.…”

Section: Introductionmentioning

confidence: 99%

“…The growth responses of bambara groundnut to water stress have previously been described under field conditions using similar growth indices of plant height, leaf number and leaf area index (Collinson et al, 1996(Collinson et al, , 1997(Collinson et al, , 1999Mwale et al, 2007;Vurayai et al, 2011aVurayai et al, , 2011bMabhaudhi and Modi, 2013). There was consensus among the researchers that drought tolerance in bambara groundnut involved reduction in these growth indices.…”

mentioning

confidence: 99%

Growth, phenological and yield responses of a bambara groundnut (<i>Vigna subterranea</i> L. Verdc) landrace to imposed water stress: II. Rain shelter conditions

Mabhaudhi

Modi

Beletse

2013

WSA

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Bambara groundnut is a protein-rich legume, with food-security potential. Effects of irrigation levels and seed coat colour on growth, development, yield and water-use efficiency of local bambara groundnut landrace selections were evaluated under a rain shelter. Emergence was slow, although variation was indicated between landraces. Limited water availability was shown to lower stomatal conductance, although chlorophyll content index was shown to be unaffected. Additionally, growth indices of plant height, leaf number and leaf area index were shown to be lower in response to decreasing water availability. Furthermore, landraces generally flowered and matured earlier while also demonstrating higher water-use efficiency at lower water availability. Seed yield was lower under limited water availability resulting from lower pod mass and pod number. Drought tolerance in bambara groundnut landraces was achieved by reduced canopy size, early flowering and maturity, and maintaining high water use efficiency under stress. 'Brown' and 'Red' landraces responded to water stress better than the 'Light-brown' landrace, suggesting an effect of seed colour on possible drought tolerance.

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Effect of Water Stress Imposed at Different Growth and Development Stages on Morphological Traits and Yield of Bambara Groundnuts (Vigna subterranea L. Verdc)

Cited by 68 publications

References 9 publications

Genotypic variability in physiological, biomass and yield response to drought stress in pigeonpea

Genotypic variability in physiological, biomass and yield response to drought stress in pigeonpea

Water use characteristics of a bambara groundnut (<i>Vigna subterranea</i> L. Verdc) landrace during seedling establishment

Growth, phenological and yield responses of a bambara groundnut (<i>Vigna subterranea</i> L. Verdc) landrace to imposed water stress: II. Rain shelter conditions

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