Características fisiológicas de porta-enxertos de videira em solução salina

Viana, Alexandre Pío; Bruckner, Cláudio Horst; Martínez, Herminia; Huaman, Carlos Alberto Martinez y; Mosquim, Paulo Roberto

doi:10.1590/s0103-90162001000100021

Cited by 7 publications

(9 citation statements)

References 7 publications

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“…The chiltepin chili plants subjected to concentrations of 200 mM of NaCl recorded effects on aerial part dry weight (PSPA) with a decrease of 90% with respect to those that did not receive a salinity treatment by adding NaCl (Figure 9). These results agree with Pio et al (2001), who asserted that dry matter decreased proportionally as salinity levels increased in f ive vine rootstocks. Taffouo et al (2009) also studied the salinity effect on Vigna unguiculata L. Walp.…”

Section: Aerial Part Dry Weight (Pspa)supporting

confidence: 92%

Natrum muriaticum atenúa el estrés por NaCl en Capsicum annuum L. var. glabriusculum

Rodríguez-Álvarez¹,

Morales-Roblero²,

Batista-Sánchez³

et al. 2020

Terra

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Soil salinity is a global problem that increases year by year in arid and semi-arid regions, including Mexico where the distribution and extension of salinized soils reduces productivity and causes severe damage to different cultivated species. Homeopathic medicine is compatible with traditional, ecologic, and organic agriculture, and it can increase tolerance to salinity stress conditions and improve soil-plant ratio. Chiltepin chili (Capsicum annuum L. var. glabriusculum) is a species of high commercial value in northern Mexico affected by soil salinity. Thus, the objective of this study was to assess the eff iciency of Natrum muriaticum (NaM) homeopathic medicine for human use, to mitigate NaCl stress in chiltepin chili established in a hydroponic system and subjected to different NaCl concentrations. A completely randomized design (2A × 3B) with factorial arrangement was used with four replicates of nine plants each. The plants were subjected to two NaCl (0 and 200 mM) concentrations, two centesimal NaM (7CH and 13CH) of NaM (NaM-7CH and NaM-13CH) dynamizations and a control treatment without NaM. The variables evaluated were length, aerial and root part fresh and dry weight, leaf area, chlorophyll A, B, total relative water content, and water potential. In general, the plants treated with NaM-13CH showed the highest values for the majority of the morphometric and physiological variables, including the plants subjected to high salinity stress by adding NaCl (200 mM). These results conf irmed that NaM attenuated NaCl stress in chiltepin chili (C. annuum L. var. glabriusculum) plants and that agricultural homeopathy has the potential to increase productivity and yield in hydroponic cultivation of the species.

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Section: Aerial Part Dry Weight (Pspa)supporting

confidence: 92%

Natrum muriaticum atenúa el estrés por NaCl en Capsicum annuum L. var. glabriusculum

Rodríguez-Álvarez¹,

Morales-Roblero²,

Batista-Sánchez³

et al. 2020

Terra

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“…Na cultivar 'Tommy Atkins', o teor de potássio decresceu em 12,2%, enquanto nas demais cultivares o decréscimo nos teores de potássio, em relação às plantas-controle, foi mais acentuado, com valores estimados em 31,4; 25,6 e 28,1% nas cultivares 'Haden', 'Palmer' e 'Ubá', respectivamente (Figura 2F). O decréscimo do teor de potássio no sistema radicular, em função do estresse salino, foi constatado por Viana et al (2001) em porta-enxertos de videira 'IAC-313', 'IAC-572' e '420-A' e Alvarez Pizarro (2006) em porta-enxertos de cajueiro.…”

Section: Resultsunclassified

“…Zuazo et al (2004) observaram aumento nos teores de cálcio foliar da mangueira cultivar 'Osteen' em função do aumento da salinidade da água de irrigação. Viana et al (2001), em videira, e Mirisola Filho (2003, em mangueira, não detectaram diferenças significativas dos teores de cálcio nas folhas do ápice, nas maioria dos porta-enxertos analisados.…”

Section: Resultsunclassified

“…Já as cultivares 'Haden' e 'Tommy Atkins' foram mais tolerantes nesta concentração, apresentando decréscimo de 6,3 e 8,5%, respectivamente. Esses resultados estão de acordo com os reportados por Viana et al (2001), que observaram redução do teor de cálcio na raiz dos porta-enxertos de videira 'IAC-313' e 'IAC-766'. Segundo Hasegawa et al (2000), o aumento da salinidade reduz a concentração de cálcio na planta.…”

Section: Resultsunclassified

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Efeito do estresse salino na absorção de nutrientes em mangueira

et al. 2012

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Avaliou-se o efeito do estresse salino sobre a massa seca, a absorção e o transporte de nutrientes nas mangueiras 'Haden', 'Palmer', 'Tommy Atkins' e 'Ubá' enxertadas sobre 'Imbu'. Foi utilizada solução nutritiva de Hoagland modificada em sistema hidropônico estático aerado, contendo: 0; 15; 30 e 45 mmol L-1 NaCl. A massa seca de raízes, caule do porta-enxerto e caule da cultivar copa, bem como das folhas, foi reduzida em concentrações a partir de 15 mmol L-1 NaCl. Ocorreu redução de N, P, K+, Ca+2 e Mg+2 nas folhas de 'Haden', 'Palmer' e 'Ubá', respectivamente. 'Tommy Atkins' não apresentou variação no teor de N, P, K+ e Ca+2 foliar. No sistema radicular, os teores de N, P, K+, Ca+2 e Mg+2 foram reduzidos com o aumento de NaCl em todas as cultivares. A concentração externa do íon Na+ reduziu os sítios de absorção de K+ e Mg+2, e o íon Cl- atuou nos sítios de absorção de N e P, inibindo sua absorção devido a mecanismos competitivos.

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“…Portanto, os efeitos do NaCl, sobre o fluxo de seiva, foram mais intensos do que sobre a transpiração (Figura 1), evidenciando, possivelmente, um componente osmótico adicional causado pelo excesso de sal no meio radicular, reduzindo o fluxo do xilema radicular. Estes resultados indicam uma grande influência da salinidade, em relação ao transporte da seiva para a parte aérea, através da redução da ascensão de água no xilema, com reflexos no fornecimento de água e nutrientes para a parte aérea (VIANA et al, 2001). …”

Section: Resultsunclassified

Nitrate uptake, xylem NO3- flux, and nitrate assimilation in cowpea exposed to salinity

Aragão

Silveira

Silva

et al. 2010

Revista Ciência Agronômica

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Palavras-chave -Estresse salino. Nitrogênio-efeito sobre as plantas. Vigna unguiculata. Xilema.Abstract -This work was carried out to evaluate what is the nitrate acquisition stage (nitrate uptake, xylem nitrate flux or assimilatory reduction) most influenced by the presence of NaCl in cowpea. Twelve day-old seedlings were treated with 50 mM of NaCl in nutrient solution during four days and measurements carried out under two contrasting environmental conditions: typical day (full sun) and completely cloudy day (cloudiness). The salinity affected more intensely the xylem sap flux and nitrate flux than transpiration. Plants treated with NaCl showed a strong decrease in both nitrate uptake rate and leaf nitrate reductase activity as in the full sun as in cloudy day. Transpiration was reduced by the cloudiness while xylem sap flux and nitrate flux remained unchanged, in both salt-treated and control. Moreover, nitrate uptake and nitrate reductase activity were less affected by cloudiness than the transpiration. In addition, NaCl negatively affected nitrate accumulation in roots, stems and leaves while the cloudiness affected only the leaf nitrate accumulation, both in control and stressed plants. Salinity affects more negatively the nitrate xylem flux, as compared with the nitrate uptake and nitrate assimilatory reduction in cowpea leaves.

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Características fisiológicas de porta-enxertos de videira em solução salina

Cited by 7 publications

References 7 publications

Natrum muriaticum atenúa el estrés por NaCl en Capsicum annuum L. var. glabriusculum

Natrum muriaticum atenúa el estrés por NaCl en Capsicum annuum L. var. glabriusculum

Efeito do estresse salino na absorção de nutrientes em mangueira

Nitrate uptake, xylem NO3- flux, and nitrate assimilation in cowpea exposed to salinity

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