Germination responses of the invasive Calotropis procera (Ait.) R. Br. (Apocynaceae): comparisons with seeds from two ecosystems in northeastern Brazil

Leal, Laura C.; Meiado, Marcos Vinícius; Lopes, Ariadna Valentina; Leal, Inara R.

doi:10.1590/s0001-37652013000300013

Cited by 26 publications

(16 citation statements)

References 23 publications

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“…Different populations of the same species may have different germination behaviour when germinated under different environmental stresses, such as extreme temperatures, water availability and salinity (Leal et al , 2013; Meiado et al , 2016). These differences observed may be related to environmental characteristics where the parental plants produce their seeds (Baskin and Baskin, 2014; Contreras-Quiroz et al , 2016).…”

Section: Discussionmentioning

confidence: 99%

Discontinuous hydration alters seed germination under stress of two populations of cactus that occur in different ecosystems in Northeast Brazil

Lima

Meiado

2017

Seed Sci. Res.

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The water uptake by the seed in arid and semi-arid ecosystems may not be continuous, but may occur in hydration and dehydration cycles (HD). In order to investigate the benefits of discontinuous hydration on seed germination of Pilosocereus catingicola subsp. salvadorensis subjected to environmental stresses, an imbibition curve was determined and times X, Y and Z selected, corresponding to 25, 50 and 75% of the first phase of imbibition, respectively. Seeds of two populations (Caatinga and Restinga) were subjected to 0, 1, 2 and 3 HD cycles, with 48 h of dehydration. Water and saline stress responses were tested at five osmotic potentials (0.0, –0.1, –0.3, –0.6 and –0.9 MPa). Discontinuous hydration provided greater tolerance to water and saline stress in the seeds from the Caatinga region. When the seeds were subjected to water stress, the reduction of the mean germination time (MGT) provided by HD cycles decreased with increasing concentration of the solution. In saline stress, the reduction of MGT was greater in the solutions with the highest concentrations. We conclude that the seeds of the same species collected from populations located in different ecosystems have different germination responses after passage through discontinuous hydration and HD cycles. This provides greater tolerance to environmental stresses but with different responses among populations.

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Section: Discussionmentioning

confidence: 99%

Discontinuous hydration alters seed germination under stress of two populations of cactus that occur in different ecosystems in Northeast Brazil

Lima

Meiado

2017

Seed Sci. Res.

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“…Kappes, Andrade, Haga, Ferreira, and Arf (2010) observed that potentials above -0.3 MPa affect seed germination and vigor of Z. mays. Leal, Meiado, Lopes, and Leal (2013) found that saline stress negatively influenced the germinability of C. procera and completely inhibiting when the seeds were submitted to a concentration equal to or greater than -0.8 MPa.…”

Section: Physico-chemical Parametersmentioning

confidence: 98%

Allelopathy of Dahlstedtia araripensis on Calotropis procera and Zea mays

Silva¹,

Bezerra²,

Cruz³

et al. 2019

JAS

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Studies related to the allelopathic properties of plants have aroused great interest, since species that have compounds with allelopathic activity can be used as bioherbicides in the control of weeds. In this way, the aim of this study was to evaluate the allelopathic action of Dahlstedtia araripensis on the germination and growth of Calotropis procera and Zea mays. The bioassays were prepared using two 50 g portions of leaves, stem bark and D. araripensis roots, and each part of the plant received a hot treatment (1 L of distilled water at 100 °C) and one part cold (1 L of distilled water at 25 °C). The experimental design consisted of six treatments and the control group. The variables analyzed were: Index of Emergency Speed (IES), germinability, length and occurrence of necrotic radicles. The results indicated that the extracts interfered negatively on the germinability of the seeds, mainly on those of C. procera, since all extracts significantly inhibited its germination. In the seeds of C. procera and Z. mays there was delay in IES. The results indicated that the cold and hot extracts of the distinct parts of D. araripensis affected the development of the seedlings, besides promoting root necrosis. The observed effects may be due to the presence of secondary metabolites detected in the different extracts of D. araripensis. However, further research is required to prove the performance of such compounds, as well as their isolation, for future use asnatural herbicides.

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“…(Apocynaceae), Parkisonia aculeata L. (Fabaceae) e Prosopis juliflora (Sw.) DC. (Fabaceae) apresentaram tolerância à salinidade (Leal et al 2013). Bezerra et al (2013), trabalhando com a espécie invasora Parksonia aculeata, não verificaram interferência em sua germinação com o aumento da salinidade no substrato.…”

Section: Resultsunclassified

Potencial da espécie invasora Cryptostegia madagascariensis em solos salinizados

Medeiros

Mesquita

Andrade

et al. 2019

PECEN

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Resumo: Este trabalho foi conduzido em casa de vegetação com vistas a avaliar os efeitos da salinidade nas características químicas de dois tipos de solo, bem como sobre a emergência e desenvolvimento inicial de plantas de Cryptostegia madagascariensis. Primeiramente, o material de um Neossolo Flúvico e de um Vertissolo foi irrigado com água salina (0,3; 1,0; 2,0 e 4,0 dS m-1). Em seguida, foram acondicionados 19 kg de cada substrato em vasos plásticos com capacidade para 21 L. Os tratamentos foram arranjados em blocos casualizados, com quatro repetições, tendo sido retiradas amostras de solo de cada unidade experimental para análise. O experimento foi instalado com dez sementes por vaso e no 10º dia após a semeadura (DAS) realizou-se o desbaste, deixando quatro plantas por vaso. As variáveis avaliadas foram: emergência de plântulas, diâmetro do caule ao nível do solo, altura de plantas, número de folhas, área foliar e tamanho das folhas aos 152 DAS. O acréscimo da salinidade elevou os níveis de Sódio, Magnésio, Potássio, Percentual de Sódio Intercambiável (PSI), Razão de Adsorção de Sódio (RAS) e Percentual de Sódio Trocável (PST) em ambos os solos, com exceção do pH no Vertissolo. Foi verificado decréscimo na emergência das sementes no Vertissolo, porém, não se observou influência no crescimento inicial das plantas em ambos os solos estudados. O aumento do teor salino das águas de irrigação elevou o caráter salino dos dois solos estudados, porém não prejudicou o crescimento inicial das plantas jovens de C. madagascariensis até os 152 dias, o que indica que a espécie é tolerante à salinidade, explicando, em parte, o sucesso desta espécie em colonizar áreas salinas, representando uma vantagem ecológica da mesma.Palavras chave: Invasão biológica, espécie exótica, Caatinga, germinação.

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Germination responses of the invasive Calotropis procera (Ait.) R. Br. (Apocynaceae): comparisons with seeds from two ecosystems in northeastern Brazil

Cited by 26 publications

References 23 publications

Discontinuous hydration alters seed germination under stress of two populations of cactus that occur in different ecosystems in Northeast Brazil

Discontinuous hydration alters seed germination under stress of two populations of cactus that occur in different ecosystems in Northeast Brazil

Allelopathy of Dahlstedtia araripensis on Calotropis procera and Zea mays

Potencial da espécie invasora <i>Cryptostegia madagascariensis</i> em solos salinizados

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