Salinidade e temperatura na germinação e vigor de sementes de mutambo (Guazuma Ulmifolia Lam.) (Sterculiaceae)

Betoni, Roseli; Scalon, Silvana de Paula Quintão; Mussury, Rosilda Mara

doi:10.1590/s0100-67622011000400004

Cited by 12 publications

(13 citation statements)

References 20 publications

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“…Considerando que o aumento da salinidade dos solos está associado à redução dos seus potenciais a ponto de limitar a germinação de sementes, estudos sobre a germinação e o desenvolvimento inicial das plântulas nessas condições, são importantes (Betoni et al, 2011). Larcher (2000) afirma que a avaliação do processo de germinação pode indicar a sensibilidade das plantas à salinidade em estádios subsequentes do crescimento e do desenvolvimento.…”

Section: Introductionunclassified

Germinação e crescimento inicial de variedades de sorgo forrageiro submetidas ao estresse salino

Coelho

Simões

Mendes

et al. 2014

Rev. bras. eng. agríc. ambient.

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R E S U M OO objetivo deste trabalho foi avaliar a tolerância à salinidade de seis variedades de sorgo forrageiro a partir da porcentagem de germinação e do crescimento inicial das plântulas submetidas a seis níveis de salinidade. Utilizou-se o delineamento experimental inteiramente casualizado, em esquema fatorial 6 x 6, com quatro repetições contendo 25 sementes. Germination and initial growth of varieties of forage sorghum under saline stress A B S T R A C TThe purpose of this study was to evaluate the salt tolerance of six varieties of forage sorghum, based on germination percentage and seedling growth subjected to six salinity levels. The treatments were arranged in a completely randomized design, according to a factorial arrangement 6 x 6 with four replications containing 25 seeds. The treatments were six varieties (V) of forage sorghum [F305 (V1), BRS 655 (V2), BRS 610 (V3), Volumax (V4), 1.015.045 (V5), 1.016.005 (V6)] and six salinity levels [0 (distilled water), 2.5, 5.0, 7.5, 10.0 and 12.5 dS m -1 ]. Experiment was conducted at the Laboratory of Seed Analysis of Embrapa Semiárido in August 2012. The variables assessed were percentage of germination, shoot (PA) and root (R) length, ratio PA/R, shoot and root fresh mass, shoot and root dry mass. Salinity levels did not affect the seed germination of varieties of forage sorghum until the conductivity of 10 dS m -1 . The salinity levels between 3 and 5 dS m -1 favored the growth of shoots and roots, showing good tolerance to salinity of forage sorghum varieties, especially F305, Volumax and 1.015.045.

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Section: Introductionunclassified

Germinação e crescimento inicial de variedades de sorgo forrageiro submetidas ao estresse salino

Coelho

Simões

Mendes

et al. 2014

Rev. bras. eng. agríc. ambient.

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“…Considerando que o aumento da salinidade dos solos está associado à redução dos potenciais osmóticos e consequentemente o potencial hídrico, fatores que limitam a germinação de sementes, estudos sobre a germinação e o desenvolvimento inicial das plântulas nessas condições são importantes (BETONI et al, 2011). Larcher (2000) afirma que a avaliação do processo de germinação e emergência pode indicar a sensibilidade das plantas à salinidade em estádios subsequentes do crescimento e do desenvolvimento.…”

Section: Introductionunclassified

Correção De Solo Salino-Sódico Com Condicionadores E Doses De Fósforo Para Cultivo Do Sorgo Sacarino

Sá¹,

Brito²,

Silva³

et al. 2018

RBAI

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RESUMOObjetivou-se com esse trabalho avaliar os atributos químicos do solo, a emergência e o crescimento inicial de plantas de sorgo sacarino em solo salino sódico tratado com gesso e enxofre elementar sob diferentes doses de fósforo. O experimento foi arranjado em esquema fatorial 2 x 5, em delineamento de blocos casualizados, com dois tratamentos de correção do solo salino-sódico (gesso e enxofre elementar) e 5 doses de superfosfato simples (0,0; 50,0; 100,0; 150,0 e 200,0 mg dm -3 ), com 3 repetições, perfazendo 30 unidades experimentais, sendo cada parcela representada por dois vasos. Para isso, amostras de um solo salino-sódico foram submetidas à correção com gesso e enxofre elementar a 100% da necessidade de gesso, e posterior lavagem com duas vezes o volume de poros, e fertilização com diferentes doses de fósforo. Após 20 dias da adubação foram semeadas três sementes de sorgo sacarino em cada vaso. As plantas de sorgo sacarino foram conduzidas por 30 dias após a semeadura, e avaliadas quanto à emergência, crescimento e acúmulo de fitomassa, após a coleta dos dados biométricos, amostras de solo foram coletadas para caracterização química. O enxofre elementar é mais eficiente na redução da salinidade e sodicidade do solo, em relação ao gesso agrícola. A dose de 90 mg dm -3 de superfosfato simples proporcionou a melhor emergência, crescimento e acúmulo de fitomassa nas plantas de sorgo sacarino cultivadas nos solos corrigido com gesso e enxofre elementar. Palavras-chave: enxofre elementar, gesso agrícola, salinidade, Sorghum bicolor, superfosfato simples. 1 Eng. Agrônomo, Doutor em Engenharia Agrícola, Programa Nacional de Pós-Doutorado -CAPES, Universidade Federal Rural do Semi-Árido, Campus Mossoró, Mossoró-RN. ABSTRACTThe objective of this work was to evaluate soil chemical attributes, emergence and initial growth of sorghum plants in sodium saline soil treated with gypsum and elemental sulfur under different doses of phosphorus. The experiment was arranged in 2 x 5 factorial scheme, in a randomized complete block design, with two treatments of saline-sodium soil (gypsum and elemental sulfur) and 5 doses of simple superphosphate (0.0, 50, 0, 100.0, 150.0 and 200.0 mg dm -3 ), with 3 replicates, making up 30 experimental units, each plot being represented by two vessels. For this, samples of a saline-sodium soil were submitted to correction with gypsum and elemental sulfur at 100% of the need for gypsum, and subsequent washing with twice the volume of pores, and fertilization with different doses of phosphorus. After 20 days of fertilization, three sorghum seeds were sown in each pot. Sorghum sorghum plants were harvested for 30 days after sowing, and evaluated for emergence, growth and phytomass accumulation, after collecting the biometric data, soil samples were collected for chemical characterization. The elemental sulfur is more efficient in the reduction of soil salinity and sodicity in relation to agricultural gypsum. The dose of 90 mg dm -3 of single superphosphate provided the best emergence, growth...

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“…Factors like water restriction, salinity, and high temperature are common and can limit the germination of seeds causing higher deterioration and decreases in the physiological quality (Betoni et al, 2011). Besides the delay in the emergence and in the growing of seedlings was also observed in rice under conditions of water restriction (Zheng et al, 2015) and Banksia sp (Cochrane et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Research Article Physiological and enzymatic alterations in sesame seeds submitted to different osmotic potentials.

et al. 2017

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ABSTRACT. With the imminence of global climate changes that affect the temperature and the rainfall uniformity, it is growing the concern about the adaptation of crops to the water deficit. Thus, the objective of this study was to evaluate alterations in physiological and enzymatic mechanisms during the germination process of sesame seeds under different water availability. To simulate the water restriction we used PEG6000, a high molecular weight molecule that does not penetrate the seed structure but allows different osmotic potentials. The treatments were -0.1, -0.2, and -0.3 MPa, and the control. Germination, first-count germination, germination velocity index, and length and dry mass of the hypocotyl and radicle were performed. The seeds were weighed before and after treatments every 3 h. After each weighing, 100 seeds were taken for analysis of the enzymes alcohol dehydrogenase (ADH), malate dehydrogenase, esterase, catalase (CAT), superoxide dismutase (SOD), isocitrate lyase (ICL), and glutamate dehydrogenase (GTDH). The statistical design was completely randomized with five replications. PEG6000 prolonged ADH activity during the beginning of germination, maintaining the anaerobic metabolism for longer. Subsequently, their activity was reduced, as well as ICL, favoring the deterioration of the seeds that take the time to germinate. Behavior was evidenced by the appearance of SOD, CAT, and GTDH isoforms after 24 h of imbibition when water restriction was imposed. Therefore, the PEG600 is efficient in simulating water deficit conditions in future scenarios of climate change, offering impotent information regarding the germination behavior of the plants under these conditions.

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Salinidade e temperatura na germinação e vigor de sementes de mutambo (Guazuma Ulmifolia Lam.) (Sterculiaceae)

Cited by 12 publications

References 20 publications

Germinação e crescimento inicial de variedades de sorgo forrageiro submetidas ao estresse salino

Germinação e crescimento inicial de variedades de sorgo forrageiro submetidas ao estresse salino

Correção De Solo Salino-Sódico Com Condicionadores E Doses De Fósforo Para Cultivo Do Sorgo Sacarino

Research Article Physiological and enzymatic alterations in sesame seeds submitted to different osmotic potentials.

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