Genótipos de feijoeiro comum sob deficiência hídrica

Guimarães, C. M.; Stone, L. F.; Peloso, M. J. Del; Oliveira, Jaison Pereira de

doi:10.1590/s1415-43662011000700001

Cited by 19 publications

(19 citation statements)

References 17 publications

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“…Aguiar et al (2008) afirmam que o feijoeiro não tem seu crescimento e produção afetados quando a água disponível no solo é mantida acima de 50% da água disponível, já que mecanismos de escape e de tolerância são demandados para deficiências hídricas mais severas (Jongdee et al, 2006). Além disso, Guimarães et al (2011) afirmam que o melhor estado hídrico pode estar associado tanto a mecanismo de contenção excessiva de perda de água como ao de melhor eficiência de absorção de água.…”

Section: Resultsunclassified

Crescimento e respostas enzimáticas do feijoeiro caupi sob estresse hídrico e nematoide de galhas

Sousa¹,

Pedrosa

Rolim

et al. 2015

Rev. bras. eng. agríc. ambient.

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R E S U M OConsiderando a importância do feijoeiro caupi no Nordeste brasileiro, o presente estudo teve, por objetivo, avaliar o crescimento e os aspectos bioquímicos do cultivar EPACE-10 submetido a estresse hídrico e parasitismo de Meloidogyne incognita em condições de casa de vegetação. O delineamento adotado foi de blocos ao acaso em esquema fatorial 2 (com e sem nematoide) × 2 (com e sem estresse hídrico), com seis repetições. O nível de estresse hídrico aplicado (50% da capacidade do campo) diminuiu a reprodução do nematoide; entretanto, o desenvolvimento das plantas aferido pelas biomassas frescas e secas do caule e folhas, número de folhas, índice de área foliar, altura da planta e pela biomassa fresca da raiz, não foi afetado pelo estresse hídrico aplicado. As respostas das enzimas oxidativas ao estresse hídrico e parasitismo de M. incognita foram variáveis. A peroxidase não foi afetada, a catálase foi diminuída pelo parasitismo do nematoide, a ascorbato peroxidade diminuída pelo estresse hídrico e a polifenoloxidase diminuída pelo estresse hídrico e pelo parasitismo de M. incognita. Growth and enzymatic responses of cowpea under water stress and root-knot nematode A B S T R A C TConsidering the importance of cowpea beans in the Northeast of Brazil, the present study aimed to evaluate growing and biochemical aspects of cultivar EPACE-10 subjected to water stress and parasitism of Meloidogyne incognita under greenhouse conditions. The design was a randomized block design in a factorial 2 (with and without nematode) × 2 (with and without water stress), with six replications. The level of applied water stress (50% of the field capacity) reduced the nematode reproduction. However, plant growth measured by fresh and dry biomass of stems and leaves, leaf number, leaf area index, plant height and fresh root biomass was not affected by water stress applied. The responses to water stress and oxidative enzymes and parasitism of M. incognita were variable. Peroxidase was not affected; catalase was decreased by nematode parasitism, ascorbate peroxidase decreased by water stress and polyphenoloxidase decreased by water stress and parasitism of M. incognita. Palavras-chave:Vigna unguiculata Meloidogyne incognita enzimas oxidativas

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Section: Resultsunclassified

Crescimento e respostas enzimáticas do feijoeiro caupi sob estresse hídrico e nematoide de galhas

Sousa¹,

Pedrosa

Rolim

et al. 2015

Rev. bras. eng. agríc. ambient.

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“…In soybean, this yield component was not affected by water regimes ( Table 1), suggesting that the viability of the pollen grains in this crop is less affected by water deficiency than in common bean. Guimarães et al (2011) reported that the number of pods per plant was more affected than the number of grains per pod, inferring that the water deficiency acts with more intensity on the abscission of flowers and pods of common bean than on the sterility of the pollen grain, which determines fewer grains per pod.…”

Section: Resultsmentioning

confidence: 99%

Susceptibility of common bean and soybean to water stress evaluated at the sitis phenotyping platform

Guimarães¹,

Stone²,

Zito³

2017

Biosci. J.

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ABSTRACT:The great challenge of breeding programs focused on tolerance to water stress is the precise, in large scale, and automated phenotyping. Therefore, the objective of this study was to assess whether the controlled conditions of SITIS Automated Phenotyping Platform and the protocol used are suitable for discriminating cultivars of common bean and soybean for tolerance to this stress. Two experiments were carried out in randomized block design, in a split plot scheme, with four replications. The main plots had five water regimes, applied after flowering: daily replacement of 100 (control), 80, 60, 40, and 20% of water evapotranspired in control. The subplots consisted of two common bean cultivars (BRS Pontal and BRS Pérola) in the 1 st experiment, and two soybean cultivars (MG/BR 46 Conquista and BR-16) in the 2 nd one. In each species, the first cultivar is more tolerant to water stress, and the second one is more susceptible. It is possible to use the SITIS Platform and the proposed protocol to evaluate common bean and soybean cultivars for tolerance to water stress. The common bean cultivars evaluated were more sensitive to this stress than soybeans. The best water status of cultivars BRS Pontal and MG/BR 46 Conquista under water stress confirmed their greater tolerance.

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“…Guimarães et al (2011) considered water deficit as more relevant for the number of pods per plant than for pollen sterility, which will determine the reduction in the number of grains per pod.…”

Section: A Bw Cw Py W Pwmentioning

confidence: 99%

“…According to Guimarães et al (2011), this component is more intensely affected than the number of grains per pod, which leads to the inference that water deficit acts more intensely on the abscission of flowers and pods than on pollen sterility, which determines lower number of grains per pod. Consequently, the higher the number of pods per plant, the greater the production, provided that these pods are filled with healthy grains.…”

Section: Introductionmentioning

confidence: 99%

Economically optimal water depth and grain yield of common bean subjected to different irrigation depths

Conceição

Robaina

Parizi

et al. 2018

Rev. bras. eng. agríc. ambient.

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Palavras-chave:Phaseolus vulgaris L. manejo de água componentes de produtividade A B S T R A C TCommon bean crop plays an important role in the world, not only in economic aspects but also in social development. The objective of this study was to evaluate the grain yield and the economically optimal water depth which reflects the maximum technical efficiency of the common bean crop. The experiment was conducted in greenhouse, in Alegrete -RS, from February to May 2016. A completely randomized design was used, consisting of five water replacement treatments (25, 50, 75, 100 and 125% crop evapotranspiration -ETc) and four replicates. Based on the obtained results, both water deficit and water excess directly affected the final grain yield of the crop. Maximum grain yield was 3,554.1 kg ha -1 , obtained by applying 492.72 mm (100% ETc). On the other hand, the economically optimal water depth was estimated at 91.2% ETc, indicating that water depths above this value are not suitable for maximum technical efficiency in the common bean crop under these conditions. It was concluded that the water depth equivalent to 100% ETc maximizes grain yield for the region of Alegrete-RS, and irrigation is considered a solution in the water supply to the common bean crop during critical periods.Lâmina ótima econômica e produção de grãos de feijão submetido a distintas lâminas de irrigação R E S U M O O cultivo do feijão apresenta importância mundial, tanto no que se refere ao desenvolvimento econômico, quanto ao caráter social. O trabalho foi realizado com o objetivo de avaliar a produção de grãos e a lâmina ótima econômica que reflete a máxima eficiência técnica da cultura do feijão. O experimento foi conduzido em casa de vegetação, em Alegrete -RS, no período de fevereiro a maio de 2016. Utilizou-se um delineamento inteiramente casualizado, composto por cinco tratamentos de reposição de água (25, 50, 75, 100 e 125% da evapotranspiração da cultura) e quatro repetições. Através dos resultados obtidos, permitiuse observar que tanto o déficit hídrico, quanto o excesso de água, afetaram diretamente na produção final de grãos da cultura. A máxima produção de grãos foi de 3554,1 kg ha -1 , aplicando-se 492,72 mm (100% da evapotranspiração da cultura). Em contrapartida, a lâmina ótima econômica foi estimada em 91,2% de reposição da ETc, indicando que lâminas acima desse valor não são adequadas visando à máxima eficiência econômica da irrigação, para a cultura do feijoeiro. Deste modo, conclui-se que a lâmina que representa 100% da evapotranspiração da cultura maximiza a produção de grãos para a região de Alegrete, RS, sendo a prática da irrigação considerada uma solução no suprimento de água para a cultura do feijão, nos períodos críticos.

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Genótipos de feijoeiro comum sob deficiência hídrica

Cited by 19 publications

References 17 publications

Crescimento e respostas enzimáticas do feijoeiro caupi sob estresse hídrico e nematoide de galhas

Crescimento e respostas enzimáticas do feijoeiro caupi sob estresse hídrico e nematoide de galhas

Susceptibility of common bean and soybean to water stress evaluated at the sitis phenotyping platform

Economically optimal water depth and grain yield of common bean subjected to different irrigation depths

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