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Nobuyasu, Hiroyuki; Liu, S.; Adu-Gyamfi, Joseph; Mohapatra, Pravat K.; Fujita, Kazuo

doi:10.1023/a:1024836600725

Cited by 15 publications

(5 citation statements)

References 29 publications

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“…Translocation of assimilates from the source leaf to the pods in soybean plant depends on many factors, such as deficiency in water supply and photosynthetic rate (Chen et al, 1993;Ohashi et al, 2000;Nobuyasu et al, 2003). According to Ohashi et al (2009) drought stress reduced the plant dry weight by decrease pod dry matter accumulation, also they found that, stress conditions reduced the rate of photosynthesis significantly, but these conditions induced greater partitioning of assimilates from the leaf compared to the well water condition.…”

Section: Pod Number/ Plantmentioning

confidence: 99%

Response of soybean (Glycine max) to molybdenum and iron spray under well-watered and water deficit conditions

Heidarzade¹,

Esmaeili²,

Bahmanyar³

et al. 2016

JEBAS

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KEYWORDS Micronutrient SoybeanWater deficit stress Yield parameters ABSTRACTEffects of foliar application of molybdenum and iron either individually or in combination on the yield properties of soybean crop were investigated under water deficit condition at research farm of Sari Agricultural Sciences and Natural Resources University, Sari, Iran during the cropping season of 2014. This experiment was laid out in factorial arrangement based on completely randomized block design with three replications. The two irrigation regimes were used (Irrigation after 65 and 130 mm evaporation from Class A pan) as primary factors while spray application of micronutrient (water as control Fe, Mo and Fe + Mo) were considered as the secondary factors. Result of study revealed that drought stress and micronutrient sprays have effect on all studied parameters such as pod number, seed number, yield and weight of 1000 seeds. Also, the interactions were statistically significant among studied parameters. According to the results drought stress severely impressed the number of pods, total seed numbers, seed yield, seed protein and seed oil. Furthermore, using of micronutrients spray particularly Fe+Mo on soybean crop is environmentally acceptable strategy and reduced the damages caused by water deficit condition.

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Section: Pod Number/ Plantmentioning

confidence: 99%

Response of soybean (Glycine max) to molybdenum and iron spray under well-watered and water deficit conditions

Heidarzade¹,

Esmaeili²,

Bahmanyar³

et al. 2016

JEBAS

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“…The material was lyophilized for dry weight estimation and ground into fine powder. The 13 C abundance in the plant material was determined using a mass spectrometer (Delta plus, Finnigan, San Jose, CA, USA), and the % excess of 13 C atom was calculated as the difference in 13 C atom % between the plant samples and the standard pure chemical glycine (Nobuyasu et al 2003).…”

Section: Measurement Of Photosynthetic Gas Exchangementioning

confidence: 99%

“…During pod development, seeds are the major sink for C assimilates in legumes (Lodeiro et al 2000;Kumudini 2002;Nobuyasu et al 2003). Drought impairs canopy photosynthesis and restricts the supply of assimilates to the pods at this stage of development (Liu et al 2004).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, vegetative growth continues during the reproductive stage and exacerbates competition for the limited production of photoassimilates. Translocation of assimilates from the source leaf to the pods in soybean plant includes many factors, such as impairment in water supply and photosynthetic rate (Chen et al 1993;Ohashi et al 2000;Nobuyasu et al 2003). The reduction in photosynthate translocation (Ohashi et al 2000), disturbances in carbohydrate metabolism of the leaves (Pelleschi et al 1997), and alterations in the concentration of different types of carbohydrate (Liu et al 2004) can increase resistance for utilization of the incoming photosynthate by the pod.…”

Section: Introductionmentioning

confidence: 99%

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Differences in the responses of stem diameter and pod thickness to drought stress during the grain filling stage in soybean plants

et al. 2008

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This study investigated the factor of the physiological characteristics causing the reduction of yield of soybean plants (Glycine max (L.) Merr.) by drought stress, by monitoring changes in stem diameter and pod thickness, and photosynthetic activity, partitioning of 13 C-labeled photosynthate. Drought stress reduced the whole plant dry weight due to the decrease in leaf and pod dry matter accumulation; however, this stress did not have a significant effect on stem growth. Leaf photosynthesis was also severely decreased by drought stress in the early stage of stress treatment as leaf water potential decreased. Imposition of stress decreased pod thickness, but stem diameter increased. The adverse effect of drought stress on pod thickness was more evident at night than during the day. The stem diameter also shrank during the day and expanded at night, but the nocturnal increase in stem diameter during drought stress treatment was greater for stressed plants compared with well-watered controls. Drought stress significantly promoted 13 C partitioning from the fed leaf to other parts of the plant; the stem was the largest beneficiary. Soluble carbohydrates accumulated in various plant parts under the influence of the stress, but starch concentration declined in all organs except the stem. These results indicated that stem growth was promoted by drought stress compared to pod growth at the early grain-filling stage.

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“…In soybean, pod number per plant, seed number per pod and 100-seed weight are major determinants of yield under water stress [101], and these yield components are the important sink for assimilates at reproductive stages [102]. Drought stress especially during flowering (R1) and pod-filling stages reduces soybean yield [30] (Table 1).…”

Section: Parameters Related To Adult Plantsmentioning

confidence: 99%

Adaptation to Water Stress in Soybean: Morphology to Genetics

Zhao¹,

Aleem²,

Sharmin³

2018

Plant, Abiotic Stress and Responses to Climate Change

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Soybean (Glycine max L.) is the most important legume and oilseed crop. As a leguminous crop, it plays an irreplaceable role towards the sustainable agricultural system with biological nitrogen fixation. However, its production can be dramatically decreased by the occurrence of water stress. Water stress including drought and flooding induces the morpho-physiological and biochemical changes at different growth stages, which negatively affects the adaptability and yield of soybean. Genetic diversity that ensures productivity in challenging environment exists within germplasm, their wild relatives and species that are adapted to the water stress. The discovery of gene mapping, QTLs associated with root traits, slow canopy wilting, nitrogen fixation and flooding tolerance have accomplished significant progress in breeding programs. Identification of drought-responsive genes and transcription factors such as WRKY, DREBs, ERFs, ZIP, ZFP, MYB and NAC are valuable to ameliorate the water stress in soybean. Understanding the genetic mechanism using transcriptomic and proteomic approaches would be the ultimate choice for mitigating the water stress. Integration of well-designed soybean breeding program coupled with omic techniques would pave the way for developing drought and flooding resilient soybean cultivars.Due to the rapid rise in the commercial value of soybean in an international market, the total area under soybean cultivation has been increasing from last three decades. Soybean is an important cash crop with a total production of over 313.05 million metric tons in 2015-2016 (USDA data). During this year, the USA has been the world's leading producer of soybean representing 35% of the world production, followed by Brazil with 31%, Argentina with 17%, China with 4%, India with 3%, Paraguay with 3% and Canada with 2% (USDA data).Water stress including drought and flooding is considered as a major threat, limiting growth and yield of plants [5,6]. Drought is caused by insufficient rainfall or irrigation which results in soil drying, whereas, in flooding, water exists in soil solution causing water logging and submergence. In response to drought and flooding stress, 40-60% yield losses have been reported in soybean [7,8]. High temperature, low humidity in atmosphere and water deficiency are the main causes of drought [9,10]. Drought stress affects germination rate and early seedling growth of the plant [11,12]. Under water deficit conditions, a significant reduction in germination, hypocotyl length, root and shoot fresh and dry weight were observed whereas the root length is increased [13]. It also affects the carbon assimilation and phenology of the plant [10]. Prolonged drought stress at different growth stages has profound effect on soybean growth and yield [14].To counteract the adverse effects of drought, the soybean plant adopts three mechanisms i.e. escape, tolerance, and avoidance [15]. In the escape mechanism, the plant completes its life cycle before the onset of drought. Normally, the plants complete their...

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Untitled

Cited by 15 publications

References 29 publications

Response of soybean (Glycine max) to molybdenum and iron spray under well-watered and water deficit conditions

Response of soybean (Glycine max) to molybdenum and iron spray under well-watered and water deficit conditions

Differences in the responses of stem diameter and pod thickness to drought stress during the grain filling stage in soybean plants

Adaptation to Water Stress in Soybean: Morphology to Genetics

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