Effect of NaCl salinity in the genotypic variation of cowpea (Vigna unguiculata) during early vegetative growth

Murillo-Amador, Bernardo; Troyo‐Diéguez, Enrique; García‐Hernández, José Luis; López‐Aguilar, Raúl; Ávila-Serrano, Narciso Ysac; Zamora-Salgado, Sergio; Rueda-Puente, Edgar Omar; Kaya, Cengiz

doi:10.1016/j.scienta.2006.02.010

Cited by 64 publications

(40 citation statements)

References 28 publications

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“…Os resultados também demonstram que os estádios de germinação e de estabelecimento da cultura foram mais sensíveis ao acúmulo de sais na zona radicular do feijão-de-corda (MURILLO-AMADOR et al, 2006). Por outro lado, MAAS & POSS (1989) observaram redução no crescimento vegetativo, tanto quando o estresse foi aplicado durante o crescimento como durante os estádios de floração e enchimento da vagem, embora as maiores reduções tenham sido verificadas quando a cultura foi irrigada durante o primeiro estádio.…”

Section: Resultados E Discussão Eficiência No Uso Da áGuaunclassified

Eficiência de utilização de água e nutrientes em plantas de feijão-de-corda irrigadas com água salina em diferentes estádios de desenvolvimento

et al. 2009

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RESUMO:O objetivo deste trabalho foi investigar os efeitos do uso de água salina em diferentes estádios de desenvolvimento de plantas de feijão-de-corda sobre a eficiência de utilização de água e de nutrientes. O experimento foi conduzido no campo e obedeceu ao delineamento em blocos ao acaso, com cinco tratamentos e cinco repetições. Os tratamentos empregados foram: T1 -água de poço com condutividade elétrica (CEa) de 0,8 dS m -1 durante todo o ciclo; T2 -água salina (CEa de 5,0 dS m -1 ) durante todo o ciclo; T3, T4 e T5 -água salina de 0 a 22 dias após o plantio (DAP), de 23 a 42 DAP e de 43 a 62 DAP, respectivamente. As plantas dos tratamentos T3, T4 e T5 foram irrigadas com água de poço nas demais fases do ciclo. Aos 8; 23; 43 e 63 DAP, as plantas foram colhidas e determinaram-se a matéria seca total e de grãos, a eficiência no uso da água, considerando a produção de matéria seca total (EUA P ) e a produção de grãos (EUA GR ), e a eficiência de utilização de nutrientes (K, Ca, N, P, Fe, Cu, Zn e Mn). A aplicação de água salina durante todo o ciclo (T2) reduziu a EUA P e a EUA GR , enquanto a aplicação de água na fase inicial do ciclo (T3) reduziu a EUA GR e a eficiência de utilização da maioria dos nutrientes. Por outro lado, a irrigação com água salina dos 23 aos 42 DAP (T4) e dos 43 aos 62 DAP (T5) não afetou as eficiências nos usos de água e de nutrientes. PALAVRAS-CHAVE:Vigna unguiculata, salinidade, eficiência no uso de água, eficiência de utilização de nutrientes. WATER AND NUTRIENT USE EFFICIENCY IN COWPEA IRRIGATED WITH SALINE WATER AT DIFFERENT GROWTH STAGESABSTRACT: The objective of this paper was to evaluate the effect of the saline water applied at different development stages of cowpea plants, on water and nutrient use efficiency. The experiment was set up in the field, during the dry season. A completely randomized block design, with five treatments and five repetitions was adopted. The treatments studied were: T1 -(groundwater with electrical conductivity (ECw) of 0.8 dS m -1 ) during the whole crop cycle; T2 -saline water (ECw = 5.0 dS m -1 ) during the whole crop cycle; T3, T4 and T5 -saline water from 0 to 22 days after sowing (DAS), from 23 to 42 DAS and from 43 to 62 DAS, respectively. The plants of T3, T4 and T5 were irrigated with groundwater in the remaining stages of the crop cycle. At 8, 23, 43 and 63 DAS the plants were harvested and the total dry mass and grain yield were measured. The water use efficiency was estimated by using total dry mass production (WUE P ) and grain yield (WUE GR ), as well as the nutrients use efficiency -NUE, (K, Ca, N, P, Fe, Cu, Zn and Mn). The application of saline water during whole the crop cycle (T2) reduced WUE P and WUE GR , while the use of saline water during the germination and initial plant development (T3) caused reduction in WUE GR and in the NUE for most of the analyzed nutrients. Irrigation with saline water from 23 to 42 DAS (T4) and from 43 to 62 DAS (T5) did not affect water and nutrient use efficiencies.

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Section: Resultados E Discussão Eficiência No Uso Da áGuaunclassified

Eficiência de utilização de água e nutrientes em plantas de feijão-de-corda irrigadas com água salina em diferentes estádios de desenvolvimento

et al. 2009

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“…Comparisons of the tolerance features demonstrated by these cvs in relation to the characterization of other cvs described by Bernardo et al, (2006) highlights the relevance of germination capacity, K + /Na + ratio and proline accumulation as important features to be explored in programs to select and/or develop tolerant cultivars, to make possible the utilization of waste saline water as well as the cultivation of vast areas of the tropical world affected by salinity.…”

Section: Camentioning

confidence: 99%

Impact of saline water stress on nutrient uptake and growth of cowpea

Patel

Kajal²,

Patel

et al. 2010

Braz. J. Plant Physiol.

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Soil salinity is a major limitation to crops production in many areas of the world. The present study reports the impact of salt stress on seeds germination, plant growth parameters and leaf ions accumulation in three cowpea [Vigna unguiculata (L. . On the other hand, height and weight of all cultivars were less affected by the salt stress. Only at 10 dS m −1 EC, significant reduction in plant height and root length could be found for all three cultivars. Salinity induced a significant increase in Na + , Cl − and proline concentrations, while reduced the accumulation of K + and Ca 2+ in leaves of all the cultivars. Moreover, the tolerance difference between the cultivars was better observed at the lowest levels of salt stress, as reveled in the measurements of K + /Na + ratio and proline content. In conclusion, this study characterizes Akshay-102 as the most tolerant cultivar and establishes the measurements of germination capacity, K + /Na + ratio and proline accumulation as an important features to be explored in programs for selection and/or development of tolerant cultivars which make possible the utilization of waste saline water as well as the cultivation of vast areas of the tropical world affected by salinity.

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“…Among the many mechanisms of salinity tolerance (Munns & Tester, 2008), the ability to restrict the entry of saline ions through the roots and limit the transport of Na + and/or Cl -to aerial parts, retaining these ions in the root and lower stem, has to be one of the most important of all the traits associated with tolerance (Colmer et al, 2005;Maathuis & Amtmann, 1999;Murillo-Amador et al, 2006). A related trait, the retention of toxic ion in roots, has been proposed to be important to salt tolerance in plants (Boursier & Läuchli, 1990;Pérez-Alfocea et al, 2000).…”

Section: Mechanisms Of Tolerancementioning

confidence: 99%