Tabebuia avellanedae Lor. ex Griseb. (Bignoniaceae) submitted at the flooding and the "Ethrel" and silver nitrate application

Davanso, Viviane M.; Medri, Moacyr Eurípedes; Souza, Luiz Antônio de; Colli, Sandra

doi:10.1590/s1516-89132003000100010

Cited by 9 publications

(8 citation statements)

References 22 publications

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“…Although the importance of adventitious roots for the adaption of P. rigida to a riparian habitat is not clear, they are commonly observed in plant species as a consequence of flooding (Huang et al, 1997;Schmull and Thomas, 2000). However, superficial roots had been described for few tropical tree species (Davanso et al, 2003;Mano et al, 2006).…”

Section: Responses To Flooding and Submergencementioning

confidence: 99%

“…Some of these traits are frequently developed by tree species living at the borders of tropical rivers. They include aerenchyma formation (Kolb et al, 1998;Medri et al, 2007), adventitious rooting (Kolb et al, 1998;Batista et al, 2008), superficial rooting (Kolb et al, 1998;Davanso et al, 2003), stem lenticel hypertrophy (Kolb et al, 1998;Santiago and Paoli, 2003;Medri et al, 1998Medri et al, , 2007Batista et al, 2008), and the opening of fissures at the base of the stems (Davanso et al, 2003). These traits facilitate inward diffusion of CO 2 and O 2 and reduce resistance against internal gas diffusion, thereby improving underwater photosynthesis and aerobic metabolism.…”

Section: Introductionmentioning

confidence: 99%

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Evidence of ecotypic differentiation between populations of the tree species Parapiptadenia rigida due to flooding

Silva¹,

Carvalho²,

Ruas³

et al. 2010

Genet. Mol. Res.

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ABSTRACT. The tree species Parapiptadenia rigida, native to southern South America, is frequently used in reforestation of riverbanks in Brazil. This tree is also a source of gums, tannins and essential oils, and it has some medicinal uses. We investigated flooding tolerance and genetic diversity in two populations of P. rigida; one of them was naturally exposed to flooding. Plants derived from seeds collected from each population were submitted to variable periods of experimental waterlogging and submergence. Waterlogging promoted a decrease in biomass and structural adjustments, such as superficial roots with aerenchyma and hypertrophied lenticels, that contribute to increase atmospheric oxygen intake. Plants that were submerged had an even greater reduction in biomass and a high mortality rate (40%). The two populations varied significantly in their RAPD marker profiles, in their ability to produce aerenchyma when waterlogged and to survive when submerged, suggesting ecotypic differentiation between them. Hence, the seasonal flooding that has been challenging the tropical riparian forest appears to be genetically modifying the P. rigida populations exposed to it by selecting individuals with increased ability to live under this condition.

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Section: Responses To Flooding and Submergencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evidence of ecotypic differentiation between populations of the tree species Parapiptadenia rigida due to flooding

Silva¹,

Carvalho²,

Ruas³

et al. 2010

Genet. Mol. Res.

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“…As plantas foram semeadas em tubetes e transferidas para vasos plásticos com aproximadamente quatro meses de idade no caso de G. ulmifolia, e dois meses para S. virgata. Vasos plásticos com capacidade para 3 litros, vedados no fundo para simulação de alagamento ou com furos, foram preenchidos com solo de barranco peneirado misturado com areia na proporção de 3:1 (Davanso et al 2003) e as plantas aclimatadas em casa de vegetação por um período de 30 dias com o substrato mantido em condições de capacidade de campo (Davanso et al 2003, Medri et al 2007.…”

Section: Methodsunclassified

“…A aplicação de Ethrel (ácido-2-cloroetilfosfônico), um liberador de etileno, intensificou as respostas de epinastia (Pimenta et al 1994, Davanso et al 2003, hipertrofia das lenticelas (Pimenta et al 1994, Davanso et al 2003, aumento do diâmetro do caule (Pimenta et al 1994, Davanso et al 2003, redução do crescimento (Davanso et al 2003) e aumento do número de raízes adventícias (Colli 1998) em plantas alagadas.…”

Section: Introductionunclassified

Efeito de alagamento e de aplicação de fitorreguladores na brotação de Guazuma ulmifolia (Malvaceae) e de Sesbania virgata (Fabaceae)

Cortezi¹,

Colli²

2011

Rev. bras. Bot.

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-(Effect of flooding and application of plant growth regulators on sprouting of Guazuma ulmifolia (Malvaceae) and Sesbania virgata (Fabaceae)). Plants of Guazuma ulmifolia Lam. (4 month-old) and Sesbania virgata (Cav.) Pers. (2 month-old) were submitted to flooding in order to assess sprouting and elongation of the stem of these species, and to examine the effect of ethylene and kinetin in theses processes. The plants were submitted to flooding or maintained in dry soil for a period of 100 days and also together with: Ethrel, Ethrel with 6-BA, 6-BA or silver nitrate. Plants of G. ulmifolia sprouted after a short period of flooding, and the application of Ethrel and of Ethrel and 6-BA, in addition to the conditions of flooding, prompted the emergence of a greater number of branches than the other treatments. The application of silver nitrate, in flooded plants of G. ulmifolia, inhibited the development of lateral branches. In S. virgata, plants that received the application of 6-BA, on substrate drained or flooded, had a larger number of branches than the other treatments. Plants of G. ulmifolia and S. virgata showed a decrease in stem elongation as lateral branches were formed. The two species showed different tolerance mechanisms that contributed to their survival under conditions of prolonged flooding.Key words -6-BA, branching, ethylene, hypoxia RESUMO -(Efeito de alagamento e de aplicação de fitorreguladores na brotação de Guazuma ulmifolia (Malvaceae) e de Sesbania virgata (Fabaceae)). Plantas de Guazuma ulmifolia Lam. e Sesbania virgata (Cav.) Pers. com quatro e dois meses, respectivamente, foram submetidas ao alagamento com o objetivo de avaliar a brotação e o alongamento do caule destas duas espécies, e analisar o efeito do etileno e da citocinina nesses processos. Para isso, as plantas foram submetidas ao solo alagado ou mantidas em solo drenado por um período de 100 dias e também acrescido, em ambos os casos, de: Ethrel, Ethrel com 6-BA, 6-BA ou nitrato de prata. As plantas de G. ulmifolia apresentaram brotação após curto período de alagamento, e a aplicação de Ethrel e de Ethrel e 6-BA, somada às condições de alagamento, estimulou o surgimento de um maior número de ramos do que nos demais tratamentos. A aplicação de nitrato de prata, em plantas alagadas de G. ulmifolia, inibiu o desenvolvimento de ramos laterais. Em S. virgata, as plantas que receberam a aplicação de 6-BA, em substrato drenado ou alagado, apresentaram maior número de ramos do que nos demais tratamentos. Tanto as plantas de G. ulmifolia como as de S. virgata apresentaram diminuição no alongamento do caule à medida que ramos laterais foram formados. As duas espécies estudadas apresentaram diferentes mecanismos de tolerância que contribuíram para sua sobrevivência em condições de alagamento prolongado.Palavras-chave -6-BA, etileno, hipoxia, ramificação

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“…Os materiais seccionados à mão livre ou em micrótomo, com espessura de 7μm, foram corados em azul de astra-fucsina básica (1:1), safranina-fast green (1:1) (Luque et al 1996) ou azul de toluidina 0,05%, pH 4,7 (O'Brien et al 1964). As lâminas permanentes foram montadas em Permount, enquanto as seccionadas manualmente foram montadas com glicerina (Davanso-Fabro et al 1998, 2003Medri et al 1998Medri et al , 2007.…”

Section: Procedimento Laboratorialunclassified

Morfoanatomia de órgãos vegetativos de plantas juvenis de Aegiphila sellowiana Cham. (Lamiaceae) submetidas ao alagamento do substrato

Medri

Ruas

et al. 2011

Acta Bot. Bras.

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ABSTRACT(Morpho-anatomy of vegetative organs in seedlings of Aegiphila sellowiana Cham. (Lamiaceae) subject to flooding). In order to uncover the morpho-anatomical responses of tree species to hypoxia, we studied the effects of flooding on vegetative organs of Aegiphila sellowiana. Young individuals were kept in drained and flooded soil for 50 and 80 days. Under flooding, there was a mortality rate of 40%. The surviving plants produced peridermic fissures, superficial roots and hypertrophied lenticels. Secondary roots of flooded plants presented greater diameter, thicker cortex, greater diameter of the cortical cells, larger intercellular spaces, and thinner vessel elements and vascular tissues. In the main roots under secondary growth and hypocotyls, cork and phelloderm became thicker under flooding. Leaves of flooded plants presented thicker midrib, larger mesophyll, higher number of trichomes and smaller stomata. Considering that part of the plants subject to flooding have died, it is possible to suggest that A. sellowiana is intolerant of soil inundation. However, the surviving plants showed morpho-anatomical modifications that could have conferred some tolerance to them. Thus, the differential tolerance observed among individuals of A. sellowiana indicates a variability of genotypes in the samples used in this study.

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Tabebuia avellanedae Lor. ex Griseb. (Bignoniaceae) submitted at the flooding and the "Ethrel" and silver nitrate application

Cited by 9 publications

References 22 publications

Evidence of ecotypic differentiation between populations of the tree species Parapiptadenia rigida due to flooding

Evidence of ecotypic differentiation between populations of the tree species Parapiptadenia rigida due to flooding

Efeito de alagamento e de aplicação de fitorreguladores na brotação de Guazuma ulmifolia (Malvaceae) e de Sesbania virgata (Fabaceae)

Morfoanatomia de órgãos vegetativos de plantas juvenis de Aegiphila sellowiana Cham. (Lamiaceae) submetidas ao alagamento do substrato

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