Soybean (Glycine max) seed growth characteristics in response to light enrichment and shading

Liu, X.; Herbert, Stephen J.; Baath, K.; Hashemi, A. M.

doi:10.17221/3363-pse

Cited by 17 publications

(15 citation statements)

References 33 publications

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“…The increase in PGR from planting to physiological maturity indicated that PGR for all genotypes followed the normal growth rate curve, which usually increases as plant growth duration increase. Similar results have been reported on soybean, barley and maize [45,46,47,48]. Increased PGR from planting to budding at 15/20˚C temperature regime and decrease from budding to flowering and flowering to physiological maturity suggest that increasing the mean night/day temperature from 12.5˚C to 17.5˚C increased PGR during the vegetative growth stage (planting to budding) by increasing the rate of leaf appearance and expansion, but as growth progress the increase in temperature decreased PGR by increasing the rate of leaf senescence and respiratory break down of photosynthates [49,50,51].…”

Section: Effect Of Temperature On Plant Growth Rate (Pgr) Relative Gsupporting

confidence: 89%

Effect of Temperature Regimes on Morphological Development of Selected Canola (Brassica napus) Genotypes

Nwogha

Agenbag

Obidiegwu

et al. 2019

JAERI

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Seven canola genotypes selected from early and mid-maturing groups of canola genotypes presently planted in the Western Cape canola production area were grown in 3 litre plastic bags filled with a mixture of sand and compost at ratio of 1:1 and irrigated with fully balanced nutrient solution at EC=2.0 in two glasshouses at night/day temperature regimes of 10/15˚C and 15/20˚C. Plant heights were measured at 14 days interval from 28 to 84 days after planting (DAP). Plants were sampled for leaf area (LA) and above ground dry mass (DM) at budding, flowering and seed physiological maturity stages. Plant growth rates (PGR) from planting to budding, from budding to flowering and from flowering to physiological maturity growth stages were calculated. Relative growth rates (RGR) and net assimilation rates (NAR) from budding to flowering and from flowering to physiological maturity stages were also calculated. Days after planting, GDD and PTU at budding, flowering and physiological maturity were correlated with leaf area, dry mass, number of pods plant-1 and pod dry mass plant-1 at budding, flowering and physiological maturity stages to determine whether there were relationships between the variables. The study showed that by increasing night/day temperature from 10/15˚C to 15/20˚C plant height, number of leaves plant-1 at budding stage, leaf area at budding , plant growth rate (PGR) from planting to budding stage and relative growth rate (RGR) from budding to flowering stage were increased. However, PGR from budding to physiological maturity, RGR from flowering to physiological maturity, net assimilation rate (NAR) from budding to flowering stage, leaf area at flowering and physiological maturity stages, as well as number of flower stems, number of pods plant-1, above ground total dry mass at flowering and physiological maturity stages were decreased. Pod dry mass at physiological maturity decreased by 22.24% to 40.35% for different genotypes which clearly demonstrated the variations in sensitivity of canola genotypes to increasing night/day temperatures and also indicates that canola crop can be genetically improved for heat tolerance.

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Section: Effect Of Temperature On Plant Growth Rate (Pgr) Relative Gsupporting

confidence: 89%

Effect of Temperature Regimes on Morphological Development of Selected Canola (Brassica napus) Genotypes

Nwogha

Agenbag

Obidiegwu

et al. 2019

JAERI

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“…Decrease of seed size in D27 of H339 in 2007 and D27 of H339 in 2008 might be caused by the greater increase of seed number per plant than increase of available amount of photosynthate synthesized per plant under the light enrichment condition. Liu et al (2006a) noticed that shading (52% light reduction) lowered seed size while Egli et al (1985) reported that shading (60% light reduction) during the linear phase of seed development lowered seed growth rate but did not affect final seed size because of a longer duration of seed growth. In our study, shading (25% light reduction) increased seed size by 7 to 11%, which might be a compensation mechanism to yield loss.…”

Section: Resultsmentioning

confidence: 99%

Soybean yield and yield component distribution across the main axis in response to light enrichment and shading under different densities

Liu¹,

Liu²,

Wang³

et al. 2010

Plant Soil Environ.

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A 2-year field experiment was conducted under light enrichment and shading conditions to examine the responses of seed yield and yield components distribution across main axis in soybean. The results showed that the maximum increase in seed yield per plant by light enrichment occurred at 27 plants/m 2 , while the most significant reduction in seed yield per plant by shading occurred at 54 plants/m 2 . Light enrichment beginning at early flowering stage decreased seed size on average by 7% while shading increased seed size on average by 9% over densities and cultivars, resulting in a fewer extent compensation in seed yield decrement. Responses to light enrichment and shading occurred proportionately across the main axis node positions despite the differences in the time (15-20 days) of development of yield components between the high and low node positions. Variation intensity of seed size of three soybeans was dissimilar as a result of changes in the environment during the reproductive period. The small-seed cultivar had the greatest stability in single seed size across the main axis, followed by moderate-seed cultivar, while large-seed cultivar was the least stable. Although maximum seed size may be determined by genetic potential in soybean plants, our results suggested that seed size can still be modified by environmental conditions, and the impact can be expressed through some internal control moderating the final size of most seeds in main stem and in all pods. It indicates that, through redistributing the available resources across main stem to components, soybean plants showed the mechanism, in an attempt to maintain or improve yield in a constantly changing environment.

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“…While studying the problem of low luminosity, Liu et al (2010) and Liu et al (2006) concluded that the occurrence of long periods of greater cloud cover can cause photosynthetic deficiency and, as a consequence, a reduction in yield. According to Santos et al (2003), in common beans, soybeans and weed plants, the yield is generally limited by photosynthetic capacity from the start of pod formation and as a result, a reduction in the rate of photosynthesis causes variations in the grain yield or biomass production.…”

Section: Acta Scientiarum Agronomymentioning

confidence: 99%

Cycle, canopy architecture and yield of common bean genotypes (Phaseolus vulgaris) in Santa Catarina State

et al. 2013

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ABSTRACT. The objective of this study was to identify the phenotypic and genotypic correlations between the plant cycle and plant habit and the effect on yield in landrace bean genotypes. The experiment was conducted in Joaçaba and Lages, Santa Catarina State for the 2008/2009 crop using 26 bean genotypes: 22 landrace and 4 commercial genotypes obtained from the UDESC. We evaluated the number of days from emergence to flowering, number of days from flowering to physiological maturity and number of days from emergence to physiological maturity in relation to the genotypes' cycle. The aerial plant architecture characteristics evaluated were the growth habit, plant habit, plant height, stem diameter, height of the first pod insertion and number of nodes on the main stem. Trail analysis showed that there was a positive correlation between the emergence-to-flowering period and yield and that the emergencephysiological maturity; flowering-physiological maturity showed a negative correlation to the yield in both locations. Therefore, short-cycle genotypes, especially those with a reduced post-flowering period, produced increased yields. The aerial plant architecture characteristics showed phenotypic and genotypic positive correlations with the yield in both environments. To increase yield, the reproductive period needs to coincide with periods of the greatest photosynthetically active radiation.

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Soybean (Glycine max) seed growth characteristics in response to light enrichment and shading

Cited by 17 publications

References 33 publications

Effect of Temperature Regimes on Morphological Development of Selected Canola (Brassica napus) Genotypes

Effect of Temperature Regimes on Morphological Development of Selected Canola (Brassica napus) Genotypes

Soybean yield and yield component distribution across the main axis in response to light enrichment and shading under different densities

Cycle, canopy architecture and yield of common bean genotypes (Phaseolus vulgaris) in Santa Catarina State

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