Some photosynthetic and growth responses of Annona glabra L. seedlings to soil flooding

Mielke, Marcelo Schramm; Matos, Elyabe Monteiro de; Couto, Virginia B.; Almeida, Alex-Alan Furtado de; Gomes, Fábio Pinto; Mangabeira, Pedro Antônio Oliveira

doi:10.1590/s0102-33062005000400025

Cited by 28 publications

(29 citation statements)

References 29 publications

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“…Such gs recovery was not observed in J. curcas plants, as reported for G. americana L., which showed reductions after 14 days even with the emergence of lenticels (Mielke et al, 2003). A species considered tolerant to flooding, Annona glabra L. showed a reduction in gs values from 4 days after the onset of the treatment, and a recovery to values comparable to control after 11 days (Mielke et al, 2005). The authors attributed this recovery to the development of hypertrophied lenticels, together with increased mass allocation to roots.…”

Section: Discussionmentioning

confidence: 52%

Leaf gas exchange and biomass partitioning in Jatropha curcas L. young plants subjected to flooding and drought stresses

Santana¹,

Silva²,

Oliveira³

et al. 2017

Aust J Crop Sci

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With the purpose of assessing the physiological responses of J. curcas young plants to drought and flooding, plants were subjected to three watering regimes: Control, drought and flooding. In the same period, five plants were submitted to drought (irrigation suspension), five to flooding and five were maintained near the field capacity (control). Measurements of leaf gas exchange, chlorophyll content, biomass of each organ (leaf, stem and root), biomass ratios, as well as the root:shoot ratio were made. When compared to control, drought and flooding treatments led to significant reductions (P≤.05) of gas exchange rates at 14 and 7 days after imposition treatments (DAIT), respectively. At the 16 th DAIT, significant reductions of leaf, root, stem and total biomass were observed, which resulted in changes of biomass partitioning of each organ. Significant reduction of leaf dry biomass (LDB) was observed in water deficit plants. Moreover, no significant effects of water deficit were observed in root dry biomass. Such response has led to a higher root:shoot ratio, suggesting an improved ability for water and nutrients uptake. In turn, flooding has induced a significant decrease in the dry biomass of all organs. Stem dry biomass ratio of flooded plants (0.67 g g -1 ) was significantly higher than that of control plants (0.41 g g -1 ), which, was seemingly due to leaf senescence and root system rotting of flooded plants. Altogether, present results reinforce the susceptibility of the studied genotype of J. curcas to flooding, as well as highlight some characteristics of drought tolerance in this species.

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Section: Discussionmentioning

confidence: 52%

Leaf gas exchange and biomass partitioning in Jatropha curcas L. young plants subjected to flooding and drought stresses

Santana¹,

Silva²,

Oliveira³

et al. 2017

Aust J Crop Sci

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“…Other authors, such as Arruda and Calbo (2004), who examined Copernicia prunifera, Mielke et al (2005b), who studied Annona glabra, and Batista et al (2008), who studied Cecropia pachystachya, also found a reduction in photosynthesis in plants subjected to flooding, a result similar to that found for Tabebuia aurea.…”

Section: Oliveira Akm E Gualtieri Scjsupporting

confidence: 56%

“…For example, Mielke et al (2005b) showed that araticum (Annona glabra L.) did not exhibit significant reductions in the photosynthetic rate after 56 days of stress due to flooded soil when compared with the control group. Batista et al (2008) showed that embaúba (Cecropia pachystachya Trec.)…”

Section: Introductionmentioning

confidence: 99%

GAS EXCHANGE IN YOUNG PLANTS OF Tabebuia aurea(Bignoniaceae Juss.) SUBJECTED TO FLOODING STRESS1

Oliveira

Gualtieri

2016

Rev. Árvore

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-The Paratudo (Tabebuia aurea) is a species occurring in the Pantanal of Miranda, Mato Grosso do Sul, Brazil, an area characterized by seasonal flooding. To evaluate the tolerance of this plant to flooding, plants aged four months were grown in flooded soil and in non-flooded soil (control group). Stomatal conductance, transpiration and CO 2 assimilation were measured during the stress (48 days) and recovery (11 days) period, totalling 59 days. The values of stomatal conductance of the control group and stressed plants at the beginning of the flooded were 0.33 mol m . Flooded soil reduced photosynthesis and stomatal conductance, leading to the hypertrophy of the lenticels. These parameters recovered and after this period, and plants exhibited tolerance to flooding stress by reducing their physiological activities.Keywords: CO 2 assimilation; Hydric stress; Hypoxia tolerance. TROCAS GASOSAS EM PLANTAS JOVENS DE Tabebuia aurea (Bignoniaceae Juss.) SUBMETIDAS A ESTRESSE POR ALAGAMENTORESUMO -O paratudo, Tabebuia aurea, é uma espécie de larga ocorrência no Pantanal de Miranda, Mato Grosso do Sul, uma área de inundação sazonal. Para determinar o grau de tolerância da espécie ao alagamento, um grupo de plantas com quatro meses de idade foi mantido em vasos alagados, além do grupo controle, com as taxas de condutância estomática, transpiração e assimilação de CO 2 determinadas durante o período de estresse (48 dias) e de recuperação (11 dias), totalizando 59 dias. Em relação aos valores obtidos, a condutância estomática, no início do alagamento, atingiu 0,33 mol m

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“…Efeitos discretos do alagamento sobre o crescimento e desenvolvimento de plantas, como o observado e C. pachystachya já foram observados em alguns estudos com outras espécies que ocorrem em locais sujeitos ao alagamento, por exemplo, em Tabebuia avellanedae não foi observado redução na massa seca das folhas, somente de raiz e de caule (Davanso et al 2002). No entanto, a maioria das espécies neotropicais tolerantes tem apresentado significativa redução do crescimento da planta como (Davanso-Fabro et al 1998), em Cytharexyllum myrianthum (Andrade et al 1999) e em Anona glabra (Mielke et al 2005), são raras as espécies tolerantes estudadas que não apresentaram redução do crescimento das raízes quando alagadas.…”

Section: Discussionunclassified

Tolerância à inundação de Cecropia pachystachya Trec. (Cecropiaceae): aspectos ecofisiológicos e morfoanatômicos

et al. 2008

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RESUMO -(Tolerância à inundação de Cecropia pachystachya Trec. (Cecropiaceae): aspectos ecofisiológicos e morfoanatômicos).Visando elucidar aspectos da tolerância à hipoxia, plantas de Cecropia pachystachya foram submetidas a 30 dias de inundação. O crescimento e desenvolvimento, a condutância estomática, a fotossíntese e a morfo-anatomia foram avaliadas. A taxa de crescimento relativo (TCR) da raiz e do caule foi inferior em plantas alagadas, não havendo diferenças nesta taxa para as folhas e para a planta inteira. A não variação na TCR das folhas pode ter sido em função da maior esclerofilia foliar das plantas alagadas, que apresentaram menor área. A condutância estomática e a taxa fotossintética diminuíram nas plantas submetidas ao alagamento. Foram observadas alterações morfoanatômicas em caules e principalmente em raízes de plantas alagadas. A análise dos resultados indica que a tolerância desta espécie a períodos de inundação está relacionada à sua capacidade de manter uma satisfatória produção energética. A manutenção de um balanço energético positivo possibilita que mesmo sob estresse, com queda na taxa fotossintética, as plantas desta espécie apresentem uma considerável TCR. Portanto, C. pachystachya pode ser forte competidora em áreas sujeitas ao alagamento. Palavras-chave: alagamento, anatomia ecológica, Cecropia pachystachya, fotossíntese, TCRABSTRACT -(Flood tolerance in Cecropia pachystachya Trec. (Cecropiaceae): ecophysiological and morpho-anatomical aspects). To elucidate certain aspects of hypoxia tolerance in Cecropia pachystachya, plants were submitted to 30 days of flooding. Growth and development, stomatal conductance, photosynthetic rates and morpho-anatomy were studied. Root and stem relative growth rates (RGR) were lower in flooded plants. There was no difference in leaf RGR and whole plant RGR. The maintenance of leaf RGR is possibly related to greater sclerophylly in flooded plants. Stomatal conductance and photosynthetic rate decreased due to flooding. Stems and roots, especially the latter, showed morpho-anatomical alterations in flooded plants. The results so far suggest that flood tolerance in C. pachystachya is related to the capacity to maintain satisfactory energy production. The maintenance of a positive energy balance allows this species to maintain a substantial RGR, even under stress with a lower photosynthetic rate. Therefore C. pachystachya may be a strong competitor in flooded areas.

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Some photosynthetic and growth responses of Annona glabra L. seedlings to soil flooding

Cited by 28 publications

References 29 publications

Leaf gas exchange and biomass partitioning in Jatropha curcas L. young plants subjected to flooding and drought stresses

Leaf gas exchange and biomass partitioning in Jatropha curcas L. young plants subjected to flooding and drought stresses

GAS EXCHANGE IN YOUNG PLANTS OF Tabebuia aurea(Bignoniaceae Juss.) SUBJECTED TO FLOODING STRESS1

Tolerância à inundação de Cecropia pachystachya Trec. (Cecropiaceae): aspectos ecofisiológicos e morfoanatômicos

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