Defoliation Levels at Vegetative and Reproductive Stages of Soybean Cultivars With Different Relative Maturity Groups

Durli, Murilo Miguel; Sangoi, Luís; Souza, Clóvis Arruda; Leolato, Lucieli Santini; Turek, Thaís Lemos; Kuneski, Hugo François

doi:10.1590/1983-21252020v33n213rc

Cited by 5 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The leaf area between stages V6 and R2 varied from 251 to 1697 cm 2 and was not affected by water restriction or defoliation (Table 1). This result corroborates with Durli et al (2020), who also reported that the leaf area between stages V6 and R2 was not influenced by defoliation at the V6 stage, regardless of the maturation group of the cultivar.…”

Section: Resultssupporting

confidence: 92%

“…Several studies have attempted to elucidate the tolerance of soybeans to defoliation at different defoliation levels and crop development stages. The results have ranged from no reduction to a 68% decrease in grain yield (Bahry et al, 2013a and b;Glier et al, 2015;Zuffo et al, 2015;Monteiro et al, 2017;Durli et al, 2020), reinforcing the need for further research on this subject.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Soybean tolerance to defoliation at the vegetative and reproductive stages as a function of water restriction

et al. 2022

Self Cite

View full text Add to dashboard Cite

Water deficiency reduces leaf expansion and photosynthetic efficiency, potentially reducing the ability to withstand leaf area (LA) loss. This study aimed to evaluate the effects of water restriction on soybean tolerance to defoliation in the vegetative and reproductive periods of development. Two experiments were conducted in a greenhouse located in Lages, Santa Catarina State Brazil, during the 2017/2018 growing season. Cultivar NA 5909 RG was subjected to three WR levels (none, moderate, and severe) and five defoliation levels (0, 17, 33, 50, and 67%). Defoliation occurred at the V6 stage in the first experiment and R3 in the second. WR occurred for 7 days after defoliation. LA at R2 and R5 after defoliation at V6 and R3 decreased by 27.5 and 64.6%, respectively, regardless of WR. LA between V6 and R2 was not influenced by WR or defoliation. Moderate or severe WR reduced plant ability to recover LA between R3 and R5. Severe WR decreased grain production by 22.2% in the vegetative period and 21.2% per plant in the reproductive period compared to that of the control, regardless of defoliation. The highest defoliation level reduced grain production per plant by 24.7 and 24.3% relative to the control at stages V6 and R3, respectively, regardless of WR. WR imposed at the vegetative and reproductive stages did not increase defoliation sensitivity.

show abstract

Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Soybean tolerance to defoliation at the vegetative and reproductive stages as a function of water restriction

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…This fact were verified due, in cultivars of indeterminate habit, stop the apical meristem growth for new nodes, internodes and leaves (Zanon et al, 2018). According Durli et al (2020) similar results confirming that soybean defoliation in the vegetative phase make the plants regrowth and expanding LAI, but not significative regrowth are observed on reproductive phases.…”

Section: Resultsmentioning

confidence: 54%

Soybean tolerance to defoliation at the beginning of pod formation as affected by plant density

et al. 2022

Self Cite

View full text Add to dashboard Cite

Soybean tolerance to defoliation at the beginning of pod formation as affected by plant density 1Soybean tolerance to defoliation may be affected by population density, as the plant population interferes with the crop leaf area index . This study aimed to evaluate the effect of defoliation at the beginning of pod formation on the agronomic performance of soybean at different plant densities. The experiment was conducted under field conditions in Campos Novos, SC, Brazil, during 2016/2017 and 2017/2018 growing season. The experimental design was a randomized block in a split-plot arrangement. The main plot consisted of three densities (100,000, 300,000, and 500,000 plants ha -1 ), whereas the subplots consisted of the cultivar NA 5909 RG submitted to five defoliation levels (0, 16.6, 33.3, 50, and 66.6%). Grain yield ranged from 4,219 to 5,356 kg ha -1 in the 2016/2017 growing season and 3,732 to 5,186 kg ha -1 in the 2017/2018 growing season. Plant density did not interfere with the grain yield response to defoliation performed at the beginning of pod formation. The 16.6% defoliation increase grain yield by 7.5 and 5.6% relative to the control in 2016/ 2017 and 2017/2018 growing seasons, respectively. The soybean tolerate defoliation of up to 33.3% at R3 with no significant decrease in grain yield, regardless of the plant density.

show abstract

“…For example, one-third leaf removal from basal portion of the canopy in cowpea increased grain yield over control and severe defoliation decreased seed yield (Hossain et al, 2006). Similarly, mild defoliations (16.6-25%) during reproductive phase do not adversely affect the seed yield in mungbean (Mondal, 2012) and in soybean (Ali et al, 2013;Durli et al, 2020). On the other hand, reverse results due to defoliation was also reported, in cowpea, in mungbean (Rao and Ghildiyal, 1985) and in soybean.…”

mentioning

confidence: 90%

“…Greater light penetration in the canopy through defoliation may reduce the abortion of flowers and immature pods (Mondal, 2012) and increase seed yield. The effect of manipulation of source (leaf) size in legumes has been studied and reported both advantageous and disadvantageous effect of defoliation in many crops (Bhatt and Rao, 2003;Durli et al, 2020). For example, one-third leaf removal from basal portion of the canopy in cowpea increased grain yield over control and severe defoliation decreased seed yield (Hossain et al, 2006).…”

mentioning

confidence: 99%

Influence of defoliation during reproductive stage on seed yield in uniculm mungbean plants

Mondal¹

2021

World J. Biol. Biotechnol.

View full text Add to dashboard Cite

An experiment was conducted at the pot yard of Bangladesh Institute of Nuclear Agriculture, Mymensingh during the period from February to May 2018 to investigate the effect of defoliations on morphological characters, yield attributes and yield of uniculm mungbean plant. The experiment comprised of nine levels of defoliation viz., control, 2, 3, 4, 5 leaves removal from base and 2, 3, 4 and 5 leaves removal from top out of 7 leaves during flowering start phase. The morpho-physiological characters such as plant height, stem diameter, leaf area and total dry mass plant-1 and number of racemes, reproductive characters such as rachis length and diameter, number of flowers plant-1 and reproductive efficiency, yield contributing characters such as number of pods plant-1, pod length, number of seeds pod-1, single pod and 100-seed weight and seed yield decreased with increasing defoliation both from base and top except basal 2 leaves defoliation. The above parameters increased over control in basal 2 leaves defoliation. The decrement due to defoliation was greater in top defoliated plants than the corresponding basal defoliated ones indicating upper leaves contributes more assimilate to the sink than the basal leaves. The highest morpho-physiological parameters, reproductive characters and yield contributing characters observed in basal 2 leaves defoliated plants which resulted the highest seed yield (5.75 g plant-1) followed by control (5.49 g plant-1). The lowest morpho-physiological parameters, reproductive and yield contributing characters recorded in top 5 defoliated plants and produced the lowest seed yield (1.21 g plant-1). These results suggest that uniculm mungbean plant tolerate basal 2 leaves loss in the canopy during reproductive stage.

show abstract

Defoliation Levels at Vegetative and Reproductive Stages of Soybean Cultivars With Different Relative Maturity Groups

Cited by 5 publications

References 12 publications

Soybean tolerance to defoliation at the vegetative and reproductive stages as a function of water restriction

Soybean tolerance to defoliation at the vegetative and reproductive stages as a function of water restriction

Soybean tolerance to defoliation at the beginning of pod formation as affected by plant density

Influence of defoliation during reproductive stage on seed yield in uniculm mungbean plants

Contact Info

Product

Resources

About