Efeitos da temperatura na germinação de sementes em culturas de feijões comuns (&lt;em&gt;Phaseolus vulgaris&lt;/em&gt; L.)

Neto, Nelson Barbosa Machado; Prioli, Maria Regina; Gatti, Ana Beatriz; Cardoso, Victor José Mendes

doi:10.4025/actasciagron.v28i2.976

Cited by 5 publications

(5 citation statements)

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“…Despite high temperatures in the greenhouse, the low fruiting rate suggests that earliness was due to a low density of flowering and fructification. Previous studies suggest that high temperatures can initiate certain developmental stages and promote early growth in plants [31,54]. Three heat stress resistance mechanisms have been identified: earliness, avoidance through protective morphological traits, and tolerance through accumulation of heat-related solutes [55].…”

Section: Discussionmentioning

confidence: 99%

“…Coping with high temperatures and environmental stress depends on both genetic and environmental factors. Certain plant genotypes may adapt better and complete their life cycle faster in response to stress, while others may be more vulnerable and prone to damage [31].…”

Section: Discussionmentioning

confidence: 99%

“…Path analysis has been suggested to show direct and indirect relationships between agro-morphological traits of plants or yield components [30][31][32][33] and stress tolerance [41,77]. According to the available literature, this is the first study using the detection of direct and indirect associations between resistance to heat stress and agro-morphological traits or physiological traits using path analysis in Phaseolus species and genotypes [35].…”

Section: Discussionmentioning

confidence: 99%

“…However, most studies are carried out under laboratory conditions and do not consider the variability of the environment, which is an important factor in the process of plant selection [14,21]. At the same time, direct and indirect associations between yield and agro-morphological traits in beans were studied several times especially in the common bean [30][31][32][33] using path analysis [34]. The path coefficient is a useful multivariate analysis in detecting not only the direct contribution of yield criteria on seed yield, but also the indirect contribution of other traits.…”

Section: Introductionmentioning

confidence: 99%

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Traits Related to Heat Stress in Phaseolus Species

et al. 2023

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Traits related to heat stress in bean species (Phaseolus spp.) have been insufficiently explored to date, yet studies of these traits are needed given that heat stress is predicted to become more frequent and severe in many parts of the world because of climate change. In order to detect agro-morphological and physiological traits related to heat stress and selection for resistance to heat stress, a total of 196 bean genotypes including eight genotypes of tepary bean (P. acutifolius L.), five genotypes of scarlet runner bean (P. coccineus A. Gray), two genotypes of year bean (P. dumosus Macfady), five genotypes of lima bean (P. lunatus L.), and 176 genotypes of common bean (P. vulgaris L.) were evaluated in 2019 and 2020 under moderate (field) and extreme heat stress (greenhouse) conditions. Although most genotypes of P. acutifolius, P. lunatus, and P. coccineus were found to be more resistant to heat stress than most genotypes of common bean, some genotypes of common bean were shown to perform as well as P. acutifolius, P. lunatus, and P. coccineus. Biomass among agronomical traits had the highest significant direct effects on the resistance to heat stress score. The maximum quantum efficiency of PSII and SPAD values among physiological traits showed significant direct effects on the resistance to heat stress score. Biomass, leaflet size, the SPAD value and maximum quantum efficiency of PSII can be considered as heat stress-related traits, and, P. acutifolius, P. lunatus, P. coccineus, and some genotypes of P. vulgaris can be considered for exploitation in a heat stress tolerance breeding program.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Traits Related to Heat Stress in Phaseolus Species

et al. 2023

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“…A germinação das sementes de muitas espécies tropicais é gravemente prejudicada quando o solo atinge altas temperaturas (CASTRO; VIEIRA, 2001). Observa-se relatos de diversos autores sobre a interferência direta da temperatura do solo sobre a dormência, germinação e emergência de espécies como capim-arroz (Echinochloa crus-galli), Buva (Conyza sumatrensis) e Caruru (Amaranthus quitensis) (MACHADO NETO et al, 2006;VIVIAN et al, 2008;BASTIANI et al, 2015).…”

Section: Introductionunclassified

Biomassa de Plantas Daninhas Emergidas em Solo Solarizado

et al. 2020

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O crescimento da agricultura orgânica, associado às mudanças de padrões de consumo e exigência dos consumidores evidencia um aumento da demanda por alimentos livres de resíduos de agrotóxicos e que apresentem menores riscos à saúde e ao meio ambiente. No entanto, por outro lado, a disponibilidade de métodos alternativos ao controle químico de plantas daninhas, entre outros organismos indesejáveis aos cultivos, ainda é um grande desafio. Dessa forma, o objetivo deste trabalho foi avaliar o efeito da solarização sobre o crescimento e desenvolvimento inicial de plantas daninhas, oriundas de propágulos presentes no solo. O experimento foi realizado na Universidade de Cuiabá, entre os dias 18/01/2018 e 22/02/2018. Foi adotado o delineamento inteiramente casualizado com cinco tratamentos e cinco repetições. Os tratamentos testados correspondem a cinco tempos de solarização do solo, sendo esses: testemunha (sem solarização), solarização por 7 dias, 14 dias, 21 dias e 28 dias. Os resultados mostraram que a solarização pode ser aplicada para a supressão de plantas daninhas. Os efeitos são variados e dependem do tempo de solarização e da espécie da planta. A solarização do solo por 14 dias demonstrou redução acima de 90% da produção de massa de matéria seca de Cyperus rotundus e a solarização por 28 dias demonstrou redução de aproximadamente 70% da produção de massa de matéria seca de Chamaesyce hirta. Palavras-chave: Solarização. Cyperus Rotundus. Chamaesyce Hirta. Controle Alternativo. Abstract The growth of organic agriculture, associated with changes in consumption patterns and consumer’s demand, shows an increase in demand for food free from residues of pesticides and have lower risks to health and the environment. But on the other hand, the availability of alternative methods to chemical weed control, and other unwanted organisms to crops, is still a big challenge. Thus, the aim of this study was to evaluate the effect of solarization on growth and early development of weed plants from seedlings in the soil. The experiment was conducted at University of Cuiabá, between 01/18/2018 and 02/22/2018. A completely randomized design was adopted with five treatments and five replications. The treatments correspond to five times of soil solarization, namely : control (no solarization), solarization for 7 days, 14 days, 21 days and 28 days. The results showed that the solarisation can be applied to the weeds removal. The effects are varied and depend on the solarization time and plant species. Soil Solarization for 14 days showed over 90% reduction of mass production Cyperus rotundus dry matter and solarization for 28 days showed a reduction of approximately 70% by weight of dry matter production of Chamaesyce hirta. The effects are varied and depend on the solarization time and plant species. Soil Solarization for 14 days showed over 90% reduction of mass production Cyperus rotundus dry matter and solarization for 28 days showed a reduction of approximately 70% by weight of dry matter production of Chamaesyce hirta. The effects are varied and depend on the solarization time and plant species. Soil Solarization for 14 days showed over 90% reduction of mass production Cyperus rotundus dry matter and solarization for 28 days showed a reduction of approximately 70% by weight of dry matter production of Chamaesyce hirta. Keywords: Solarization. Cyperus Rotundus. Chamaesyce Hirta. Alternative Control

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