2007
DOI: 10.17660/actahortic.2007.740.27
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Papaya Plant Growth as Affected by Soil Air Oxygen Deficiency

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Cited by 8 publications
(5 citation statements)
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“…Reduced oxygen can occur as a result of tropical storms that saturate the soil for several days, flood irrigation, as well as micro-irrigation practices that create microenvironments of reduced soil oxygen. A completely flooded soil can cause death to papaya plants in 2 d (Wolf and Lynch, 1940;Khondaker and Ozawa, 2007) or 3 to 4 d (Samson, 1980). Under hypoxic conditions, simulated by alterations in the oxygen concentration in a hydroponic system, Marler et al (1994) showed that compared to the control (6.54 mg O 2 L -1 ), g s decreased shortly after 1 d of treatment with low and moderate oxygen levels (0.63 and 3.62 mg O 2 L -1 , respectively).…”
Section: Soil Chemical Effects On Papaya Productivitymentioning
confidence: 99%
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“…Reduced oxygen can occur as a result of tropical storms that saturate the soil for several days, flood irrigation, as well as micro-irrigation practices that create microenvironments of reduced soil oxygen. A completely flooded soil can cause death to papaya plants in 2 d (Wolf and Lynch, 1940;Khondaker and Ozawa, 2007) or 3 to 4 d (Samson, 1980). Under hypoxic conditions, simulated by alterations in the oxygen concentration in a hydroponic system, Marler et al (1994) showed that compared to the control (6.54 mg O 2 L -1 ), g s decreased shortly after 1 d of treatment with low and moderate oxygen levels (0.63 and 3.62 mg O 2 L -1 , respectively).…”
Section: Soil Chemical Effects On Papaya Productivitymentioning
confidence: 99%
“…The control treatment did not show stomatal closure. Khondaker and Ozawa (2007) constructed chambers that controlled soil gas composition at ambient (20%), 18% and 11% oxygen; under soil oxygen at and below 18%, A, chlorophyll content, large and small roots, and shoot dry matter were all decreased. According to Schaffer et al (1992), even in species considered tolerant, reduction in gas exchange is common during hypoxia conditions, although they promptly resume growth and gas exchange after the stress is removed.…”
Section: Soil Chemical Effects On Papaya Productivitymentioning
confidence: 99%
“…Este resultado confirma que los daños más grandes en suelos anegados corresponden al sistema radical, debido a un suministro insuficiente de oxígeno (Yamauchi et al, 2013;Khondaker y Ozawa, 2007). La hipoxia o incluso la anoxia en la rizósfera es la consecuencia inmediata del anegamiento (Sauter, 2013), teniendo en cuenta que la resistencia a la difusión de oxígeno es hasta 10.000 veces mayor en soluciones del agua que en el aire (Vartapedian y Jackson, 1997).…”
Section: Peso Seco De La Raízunclassified
“…El exceso de agua en el suelo crea deficiencias de oxígeno en la zona de raíz, pudiéndose disminuir su crecimiento normal (Khondaker y Ozawa, 2007) y, además, la mayor producción de etileno en las condiciones hipóxicas disminuye la elongación de este órgano (Lambers et al, 2008). No se encontraron efectos más contundentes en esta variable, debido principalmente al hecho de que por tratarse de un muestreo destructivo, las raíces podrían haber sufrido un daño severo mecánico por la eliminación del suelo.…”
Section: Longitud De Raíz Pivotanteunclassified
“…Esse fenômeno provoca o acumulo de água na superfície do solo e interfere no fluxo de massa, na difusão dos gases e da solução do solo, o que diminue a velocidade de infiltração da água agravando as deficiências hídricas em profundidade nos períodos secos (Khondaker & Ozawa, 2007). A coesão subsuperficial, por sua vez, restringe as raízes a um pequeno volume de solo, pois cerca de 90% das raízes do mamoeiro, nos Tabuleiros Costeiros, estão à distância de até 0,50 m do caule e 80% à profundidade de 0-0,40 m (Coelho et al, 2005;Souza et al, 2006).…”
Section: Introductionunclassified