Responses of Papaya Seedlings (Carica papaya L.) to Water Stress and Re-Hydration: Growth, Photosynthesis and Mineral Nutrient Imbalance

Mahouachi, Jalel; Socorro, A.R.; Talón, Manuel

doi:10.1007/s11104-005-3935-3

Cited by 74 publications

(56 citation statements)

References 24 publications

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“…dm -3 ) in the soil resulted in a greater accumulation of this element in plant tissues. In theory, it should have contributed to the increase and maintenance of the cell turgor, even under conditions of low water potential due to drought (MAHOUACHI et al, 2006). However, in this study, it was not verified that the potassium minimized water stress effects.…”

Section: Dm -3contrasting

confidence: 57%

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Effects of potassium application and soil moisture on the growth of Corymbia citriodora plants

Sá

Valeri

Cruz

et al. 2014

CERNE

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ABSTRACT:The objective of this work was to evaluate the effects of potassium and soil moisture levels on the growth of Corymbia citriodora plants. Four doses of potassium were applied (0, 40, 80 and 120 mg . dm -3 ) and three soil moisture levels were established (50-80%, 65-80% and 80% of maximum soil field capacity). The experiment was a 4 x 3 factorial arrangement of treatments within a randomized complete design with six replications for each treatment and one pot with two plants for each plot. At 90 days after planting, the plant growth parameters: survival rate, height, stem diameter, leaf area, relative chlorophyll concentration, leaf dry mass, stem and branches dry mass, root dry mass, total dry mass and leaf macronutrient contents were measured. High soil moisture content is necessary for Corymbia citriodora seedlings at nursery stage. Effects of the K doses were not observed in plants, even when they were cultivated in a soil with a low content of this nutrient. EFEITOS DA APLICAÇÃO DE POTÁSSIO E UMIDADES DO SOLO NO CRESCIMENTO DE PLANTAS DE Corymbia citriodora RESUMO:Conduziu-se este trabalho, com o objetivo de avaliar os efeitos de doses de potássio e umidades do solo no crescimento de plantas de Corymbia citriodora. Foram aplicadas quatro doses de potássio (0, 40, 80, e 120 mg . dm -3 ) e promovidas três níveis de umidades do solo (50-80%, 65-80% e 80% do volume máximo de água retido pelo solo em vaso), combinadas em um esquema fatorial 4x3. O delineamento experimental foi inteiramente casualizado com seis repetições, e cada parcela foi composta por um vaso contendo duas plantas. Aos 90 dias após o plantio, foram avaliados: porcentagem de sobrevivência, altura, diâmetro do caule, área foliar, teor relativo de clorofila, massa de matéria seca de folhas, de caule e ramos, de raízes e total, e teor de macronutrientes nas folhas. Mudas de Corymbia citriodora necessitam de alta umidade do solo na fase de viveiro. Não foram observados efeitos das doses de potássio nas plantas, mesmo quando a concentração desse nutriente no solo era baixa.

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Section: Dm -3contrasting

confidence: 57%

“…This characteristic, amongst others, enables this nutrient to minimize the deleterious effects caused by drought (CAKMAK, 2005;MAHOUACHI et al, 2006). Furthermore, the osmotic adjustment slowly develops in response to dehydration.…”

Section: Dm -3mentioning

confidence: 99%

Effects of potassium application and soil moisture on the growth of Corymbia citriodora plants

Sá

Valeri

Cruz

et al. 2014

CERNE

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“…Marler et al (1994) also suggested that delaying dehydration appears to be the adaptation that papaya uses in response to drought, even though osmotic adjustment was not demonstrated. However, Mahouachi et al (2006) found that osmotic adjustment is a contributing factor in drought adaptation in 'Baixinho de Santa Amália' papaya. In any case, Marler et al (1994) and Torres-Netto (2005) demonstrated that there is genetic variability in papaya cultivar response to soil water deficits providing clues to the mechanisms of drought adaptation.…”

Section: Ecophysiology Of Papayamentioning

confidence: 91%

Ecophysiology of papaya: a review

Campostrini

Glenn

2007

Braz. J. Plant Physiol.

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Papaya (Carica papaya L.) is a principal horticultural crop of tropical and subtropical regions. Knowledge of how papaya responds to environmental factors provides a scientific basis for the development of management strategies to optimize fruit yield and quality. A better understanding of genotypic responses to specific environmental factors will contribute to efficient agricultural zoning and papaya breeding programs. The objective of this review is to present current research knowledge related to the effect of environmental factors and their interaction with the photosynthetic process and whole-plant physiology. This review demonstrates that environmental factors such as light, wind, soil chemical and physical characteristics, temperature, soil water, relative humidity, and biotic factors such as mycorrhizal fungi and genotype profoundly affect the productivity and physiology of papaya. An understanding of the environmental factors and their interaction with physiological processes is extremely important for economically sustainable production in the nursery or in the field. With improved, science-based management, growers will optimize photosynthetic carbon assimilation and increase papaya fruit productivity and quality. Key words: Carica papaya, environmental factors, photosynthesis, water relations, water-use efficiency Ecofisiologia do mamoeiro: uma revisão: O mamoeiro (Carica papaya L.) é uma das principais culturas das regiões tropicais e subtropicais. O conhecimento das respostas dessa cultura aos fatores do ambiente pode fornecer bases científicas para traçarem-se estratégias de manejo que possam otimizar a produção e a qualidade dos frutos. Um melhor entendimento das respostas dos genótipos aos fatores específicos do ambiente poderá contribuir para um eficiente zoneamento agrícola e para futuros programas de melhoramento da espécie. Objetivou-se apresentar o estado-da-arte do conhecimento relacionado aos efeitos e à interação dos fatores ambientes sobre o processo fotossintético e a fisiologia da planta inteira. Nesta revisão, demonstra-se que os fatores do ambiente, como luz, vento, característica físicas e químicas do solo, temperatura, água no solo, umidade relativa, além de fatores bióticos, como fungos micorrízicos e o genótipo, podem afetar intensamente a produtividade e a fisiologia do mamoeiro. Uma compreensão da ação dos fatores do ambiente e suas interações com o processo fisiológico dessa espécie são de grande importância para a sustentabilidade econômica da produção do mamoeiro, em condições de viveiro e de campo. A partir de um manejo da cultura baseado em resultados científicos, será possível otimizar a assimilação fotossintética do carbono e elevar a qualidade e produção de frutos do mamoeiro. Palavras-chave: Carica papaya, eficiência do uso da água, fatores ambientes, fotossíntese, relações hídricas

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“…Leaf transpiration occurs simultaneously with photosynthesis, and photosynthesis system can be used as a reliable and accurate tool for the measurement of transpiration (Mahouachi et al, 2006;Mengistu et al, 2011). In this study, an LCpro+ photosynthesis system (model LCpro+, ADC BioScientific Ltd., Hertfordshire, England) was used to measure transpiration at the leaf scale.…”

Section: Photosynthesis Systemmentioning

confidence: 99%

A comparison of methods for determining field evapotranspiration: photosynthesis system, sap flow, and eddy covariance

Zhang

Tian

et al. 2014

Hydrol. Earth Syst. Sci.

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Abstract.A multi-scale, multi-technique study was conducted to measure evapotranspiration and its components in a cotton field under mulched drip irrigation conditions in northwestern China. Three measurement techniques at different scales were used: a photosynthesis system (leaf scale), sap flow (plant scale), and eddy covariance (field scale). The experiment was conducted from July to September 2012. To upscale the evapotranspiration from the leaf to plant scale, an approach that incorporated the canopy structure and the relationships between sunlit and shaded leaves was proposed. To upscale the evapotranspiration from the plant to field scale, an approach based on the transpiration per unit leaf area was adopted and modified to incorporate the temporal variability in the relationship between leaf areas and stem diameter. At the plant scale, the estimate of the transpiration based on the photosynthesis system with upscaling was slightly higher (18 %) than that obtained by sap flow. At the field scale, the estimates of transpiration derived from sap flow with upscaling and eddy covariance showed reasonable consistency during the cotton's open-boll growth stage, during which soil evaporation can be neglected. The results indicate that the proposed upscaling approaches are reasonable and valid. Based on the measurements and upscaling approaches, evapotranspiration components were analyzed for a cotton field under mulched drip irrigation. During the two analyzed sub-periods in July and August, evapotranspiration rates were 3.94 and 4.53 m day −1 , respectively. The fraction of transpiration to evapotranspiration reached 87.1 % before drip irrigation and 82.3 % after irrigation. The high fraction of transpiration over evapotranspiration was principally due to the mulched film above the drip pipe, low soil water content in the inter-film zone, well-closed canopy, and high water requirement of the crop.

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Responses of Papaya Seedlings (Carica papaya L.) to Water Stress and Re-Hydration: Growth, Photosynthesis and Mineral Nutrient Imbalance

Cited by 74 publications

References 24 publications

Effects of potassium application and soil moisture on the growth of Corymbia citriodora plants

Effects of potassium application and soil moisture on the growth of Corymbia citriodora plants

Ecophysiology of papaya: a review

A comparison of methods for determining field evapotranspiration: photosynthesis system, sap flow, and eddy covariance

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