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Physiology of seed yield in mungbean: Growth and dry matter production

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Growth rate of mungbean was very slow during the vegetative phase in all the four genotypes. A relatively smaller portion of total dry matter (TDM) was produced before flower initiation and the bulk of it after anthesis. The maximum crop growth rate (CGR) was observed due to maximum leaf area (LA) development during the pod filling stage in all the genotypes. LA and CGR contributed to the superior TDM production. It appeared that a high yielding mungbean genotype should possess larger LA, high TDM production ability, superior CGR at all the growth stages, high relative growth rate and net assimilation rate at the vegetative stage as superior yield components.
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... A plant with best LAI and NAR may have a greater biological yield. The ability to efficiently partition between vegetative and reproductive parts may result in high yield potential (Mondal et al., 2011c). For optimum yield in mungbean, the LAI should be ranged from 3.5 to 4.5 (Ali et al., 2021). ...
... Initially, the RGR and NAR values were high and decreasing with age until maturity. RGR decreased substantially in the majority of field crops as plant age increased (Mondal et al., 2011c;Malek et al., 2012;Mondal et al., 2015). The genotypes' RGR and NAR values peaked between 20 and 30 DAS and then began to decline, reaching their lowest points at maturity (60-70 DAS). ...
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The experiment was conducted during February to May, 2019 at the research farm of Bangladesh Institute of Nuclear Agriculture, Mymensingh-2202. The objective of the study was to evaluate the growth, reproductive characteristics, yield and yield components of four similar durated mungbean genotypes, namely BARI Mung-2, Binamoog-2, MB-29, and MB-43. At most of the growth stages, the mutant MB-29 showed superiority in terms of growth parameters such as total dry matter, leaf area index, absolute growth rate, relative growth rate, and net assimilation rate whilst MB-43 showed the inferiority. Furthermore, MB-29 outperformed the other three genotypes in yield attributing features, resulting in a higher seed yield than the other three genotypes. In comparison, the MB-43 mutant showed the lowest value for the yield parameters. The seed yield correlated positively and significantly with leaf area, total dry matter, absolute growth rate, and number of pods plant-1. J. Bangladesh Acad. Sci. 47(1); 101-108: June 2023
... Mungbean is an excellent supplemental protein source for rice diet. Besides providing valuable protein in the diet, mungbean has the remarkable quality of helping the symbiotic root rhizobia to fix atmospheric nitrogen and hence to enrich soil (Mondal et al., 2011a). ...
... Important physiological attributes such as leaf area index (LAI), crop growth rate (CGR) and net assimilation rate (NAR) can address various constraints of a variety for increasing its productivity (Mondal et al. 2011a). A plant with optimum LAI and NAR may produce higher biological yield. ...
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... However, the cultivar PSL-9 reported the least branches number and pods plant -1 . Significant results among different cultivars of crop for number of pods plant -1 was also reported by Gupta et al. (2006) and Mondal et al. (2011). The number of seeds per pod has shown no significant difference among the mulches and varietal treatments. ...
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... However, the variety PSL-9 reported the least branches number and pods per plant. Significant results among different varieties of crop for number of pods per plant was also reported by Gupta et al., 2006;Mondal et al., 2011. The significant results were reported among mulch treatments for economic yield (Fig 5.21). ...
... A plant with optimum LAI may produce higher biological yield (Mondal et al., 2012). The dry matter accumulation may be the highest if the LAI attains its maximum value within the shortest possible time (Mondal et al., 2011). Some authors have reported that in lentil higher performance are achieved by the contribution of various yield components (Anzam et al., 2005;Kakde et al., 2005;Tabu and Sakar, 2008;Younis et al., 2008;Karadavut, 2009). ...
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The present experiment was conducted to evaluate some morpho-physiological features and its impact on seed yield of four lentil varieties viz., Binamasur-3, Binamasur-4, Binamasur-5 and BARI Masur-5 during the period from November 2014 to March 2015 at Ishurdi, Bangladesh under subtropical condition (24°8´ N 90°0´ E). The growth rate found very slow during the vegetative phase in all the genotypes due to a relatively smaller portion of dry matter production before flower initiation and bulk of it after anthesis. The maximum growth rate was observed at flowering stage (62-72 days after sowing) in all genotypes. Binamasur-5 showed maximum growth and dry mass accumulation at vegetative stage but minimum at reproductive stage in comparison to other genotypes. Plant height of Binamasur 5 found minimum but seed yield and harvest index and other yield attributes were produced height among the four genotypes. Besides maturity duration of Binamasur-5 is lower (96 days) than Binamasur-4 (97 days), BARI Masur-5 (98 days) and Binamasur-3 (100 days). Results indicate that genotype improvement efforts have achieved higher seed yield by higher growth rate at early growth stages and better assimilate partitioning to economic yield. The bushy plants are unlikely to yield improvement. The variety, Binamasur-5 had short plant stature with increase branches there by produce more pods/plant resulting higher seed yield. This information may be used in future plant breeding programme.
... The AGR was higher in organic manure applied plant due to higher TDM (Fig. 1A). AGR is positively correlated with LAI because of TDM production depends on LAI [22]. The AGR increased along with increase in LAI. ...
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... AGR is positively correlated with LAI. 11 The AGR increased along with increase in LAI. At 60-70DAS, the AGR value was found to be maximum which mean that plants expanded it's assimilate for the growth of leaf area and feeding of fruits. ...
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Growth analysis techniques were used to study components of dry matter accumulation in field soybean [ Glycine max (L.) Merrill] communities at Lafayette, Ind. in 1968 and 1969. An analysis was made of dry matter accumulation in leaf, supporting, pod wall, and seed fractions, as well as the total aboveground portion of the crop. General approach with the 1968 data was to select mathematical functions which describe the dry weight and leaf area vs. time relationships and then to calculate, for each day during the growing season, instantaneous values of relative growth rate (RGR), crop growth rate (CGR), net assimilation rate (NAR), leaf area ratio (LAR), and the components of LAR. From the 1969 data, weekly mean RGR's and CGR's were calculated, using traditional growth analysis formulae. The RGR of each individual plant fraction steadily decreased, at a decreasing rate, as the season progressed, At any given time, the most recently initiated plant fraction had the greatest RGR. The CGR of each fraction rose to a peak and then declined. Growth rate of the leaf component peaked first, followed in sequence by supporting, pod wall, and seed components. Apparently due to late planting in 1968, there was a greater overlap of vegetative and seed growth than in 1969 when planting was earlier. Total aboveground RGR declined until early August, then rose to a secondary peak in mid‐August. At the same time, there also occurred a peak in total aboveground CGR. The increases in RGR and CGR during August are attributable to a concurrent increase in NAR. The increase in NAR is interpreted as a response of the photosynthetic apparatus to an increased demand for assimilates. The increased demand for assimilates was due to rapid growth of the seed fraction.
Growth analysis in mungbean
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Salam MA, AFM Moniruzzaman and SI Chowdhury 1987. Growth analysis in mungbean. Bangladesh J. Nuclear Agric. 3: 58-64
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Variation in some physiological components of yield in induced mutants of mungbean In: Induced mutations- a tool in plant breeding IAEA-SM-251/5) Results showed that, MB-35 and MB-45 genotypes performed higher grain yield than
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Thakare, RG, SE Pawar, DC Jashua, R Mitra and CR Bhatia 1981. Variation in some physiological components of yield in induced mutants of mungbean. In: Induced mutations- a tool in plant breeding. pp. 213-226. IAEA-SM-251/5. International Atomic Energy Agency, Vienna. (Manuscript received on 11 June, 2011; revised on 19 September, 2011) Results showed that, MB-35 and MB-45 genotypes performed higher grain yield than, MB-16