Climate change determined drought stress profiles in rainfed common bean production systems in Brazil

Heinemann, A. B.; Ramírez-Villegas, Julián; Stone, L. F.; Didonet, Agostinho Dirceu

doi:10.1016/j.agrformet.2017.06.005

Cited by 35 publications

(30 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A worldwide production of 55,627 Mt in 38,038,865 ha was recorded for green and dry beans in 2017 [3]. Studies have projected a reduction in climate conditions due to heat and drought stress in a large part of bean crops in South America [4].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Chlorophyll α Fluorescence Parameters as an Indicator to Identify Drought Susceptibility in Common Bush Bean

Sánchez-Reinoso¹,

Moreno²,

Restrepo-Díaz³

2019

Agronomy

View full text Add to dashboard Cite

The common bean is susceptible to drought conditions and the evaluation of plant responses to low water availability can be difficult. The quantification of chlorophyll fluorescence as a sensitive trait to environmental stresses is an important alternative in the characterization of drought-susceptible genotypes. The objective of this study was to evaluate mainly the use of chlorophyll α fluorescence (maximum efficiency of PSII (Fv/Fm), photochemical quenching (qP), non-photochemical quenching (NPQ)) and rapid light-response curves (RLCs) (initial slope of the curve (α), minimum saturation irradiance (Ik) and maximum relative electron transport rate (ETRmax)) parameters as tools for the identification of susceptible or tolerant bush bean cultivars to water deficit stress conditions in two different phenological stages. Using a randomized block design in a factorial arrangement, five bush bean cultivars (Cerinza, Bachue, NUA35, Bacata and Bianca) were evaluated under water deficit conditions by the suspension of irrigation for 15 days from 40 to 55 Days after Emergence (DAE) (vegetative stage) or 50 to 65 DAE (reproductive stage). The results showed that Fv/Fm and NPQ recorded the highest variation due to water deficit conditions, especially in the vegetative stage. The greatest reductions in Fv/Fm (0.67) and NPQ (0.71) were evidenced in cultivar NUA35 compared to its control plants (0.78 and 1.07, respectively). The parameters obtained from RLCs showed that cultivar Bacata registered the lowest α (0.17) and Ik (838.19 μmol∙m−2∙s−1) values compared to its control plants (α 0.23; Ik 769.99 μmol∙m−2∙s−1). Differences were only obtained in ETRmax in the reproductive stage (50–65 DAE) in which cultivar NUA35 reached values of 158.5 in stressed plants compared to control plants (251.22). In conclusion, the parameters derived from RLCs such as α and Ik can be used as tools to identify drought susceptibility in the vegetative stage, whereas ETRmax can be used in the reproductive stage. In addition, PSII photochemistry (Fv/Fm and NPQ) can also help to understand the agronomic responses of common bush bean cultivars to drought conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Knowledge of the mechanisms of genotype acclimation to adverse environmental conditions is an effective strategy to reduce vulnerability to climate change [4]. Techniques to facilitate the identification of drought-tolerant genotypes have become important in modern agriculture [7].…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll α Fluorescence Parameters as an Indicator to Identify Drought Susceptibility in Common Bush Bean

Sánchez-Reinoso¹,

Moreno²,

Restrepo-Díaz³

2019

Agronomy

View full text Add to dashboard Cite

show abstract

“…Relacionado aos alimentos, o setor agropecuário se apresenta como altamente dependente das condições ambientais e climáticas, sendo o risco climático e os modelos de previsão do Intergovernmental Panel on Climate Change (IPCC) incorporados como instrumentos da política pública de gestão de riscos na agricultura desde 1996 (ASSUNÇÃO; CHEIN, 2016). Alguns impactos previstos são a diminuição da produção de leites e dos cultivos de café, feijão, milho e soja (RIO et al, 2016;HEINEMANN et al, 2017). Esses resultados estão refletidos na percepção de que as mudanças climáticas influenciam de forma negativa o setor de alimentos, podendo também estar relacionada à crise de alimentos de 2007de -2008de (McMICHAEL, 2009) e ao aumento dos preços de alguns itens alimentares nos últimos anos, como, por exemplo, o feijão em 2016.…”

Section: Discussionunclassified

Percepções de universitários sobre as mudanças climáticas e seus impactos: estudo de caso no Distrito Federal

Mesquita

Braz

Morimura

et al. 2019

Ciênc. educ. (Bauru)

View full text Add to dashboard Cite

Resumo As atividades humanas vêm alterando o meio ambiente e contribuindo para a aceleração das mudanças climáticas (MC). Diante disso, é necessária a compreensão de como novas percepções podem resultar em ações em prol do ambiente, além do papel da educação ambiental nessa equação. Logo, foram aplicados 1526 questionários objetivando compreender a percepção de universitários sobre os impactos das MC em diferentes setores da sociedade e extratos sociais, além de outras crenças pessoais. Observou-se a necessidade de maior abordagem de conhecimentos ambientais, com a inserção desses temas nos currículos de todos os níveis de ensino, em consonância com a lei 9795/99. Além disso, o limitado conhecimento sobre a ligação entre informação, percepção e ações de enfrentamento às mudanças no clima, indica a necessidade de desenvolvimento de mais pesquisas que possam explorar como a melhor qualidade de ensino na educação ambiental e climática pode auxiliar nas percepções e ações em prol das políticas públicas de adaptação e mitigação.

show abstract

“…2.1, CGIAR's work on TPEs for breeding programs is less in terms of number of crops covered and published studies (Figure 2a, b). CGIAR's collaborative efforts include studies addressing drought for rice (Heinemann et al, 2015;Ramirez-Villegas et al, 2018) and beans (Heinemann et al, 2016(Heinemann et al, , 2017 under current and future climate in Brazil. Significant breeding progress has resulted from these studies, including improvements in drought phenotyping in a drought-prone environment which allows controlling the timing, intensity, and duration of drought, reducing the uncertainty associated with climate variability trials in the main season (Martinez et al, 2014).…”

Section: Environmental Characterization For Setting Breeding Prioritiesmentioning

confidence: 99%

CGIAR modeling approaches for resource‐constrained scenarios: I. Accelerating crop breeding for a changing climate

et al. 2020

View full text Add to dashboard Cite

Crop improvement efforts aiming at increasing crop production (quantity, quality) and adapting to climate change have been subject of active research over the past years. But, the question remains 'to what extent can breeding gains be achieved under a changing climate, at a pace sufficient to usefully contribute to climate adaptation, mitigation and food security?'. Here, we address this question by critically reviewing how model-based approaches can be used to assist breeding activities, with

show abstract

Climate change determined drought stress profiles in rainfed common bean production systems in Brazil

Cited by 35 publications

References 46 publications

Chlorophyll α Fluorescence Parameters as an Indicator to Identify Drought Susceptibility in Common Bush Bean

Chlorophyll α Fluorescence Parameters as an Indicator to Identify Drought Susceptibility in Common Bush Bean

Percepções de universitários sobre as mudanças climáticas e seus impactos: estudo de caso no Distrito Federal

CGIAR modeling approaches for resource‐constrained scenarios: I. Accelerating crop breeding for a changing climate

Contact Info

Product

Resources

About