Central Amazon Floodplain Forests: Root Adaptations to Prolonged Flooding

Simone, Oliviero De; Junk, Wolfgang J.; Schmidt, Wolfgang

doi:10.1023/b:rupp.0000003285.70058.4c

Cited by 28 publications

(16 citation statements)

References 48 publications

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“…Different soil water gradients will influence the characteristics of photosynthetic physio-ecological response of tree species (Anderson and Pezeshki, 1999;He and Ma, 2000;Chen et al, 2003;Liu et al, 2003;Simone et al, 2003;Zhao et al, 2003;Ma et al, 2004;Shi et al, 2004). A range of physiological traits in the photosynthesis of pondcypress seedlings will be subjected to water level fluctuations in the hydro-fluctuation belt of the Three Gorges Reservoir Area.…”

Section: Discussionmentioning

confidence: 97%

Photosynthetic physio-response of Taxodium ascendens seedlings to different soil water gradients

Zhong

2007

Front. Forest. China

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Four different kinds of water treatments were applied to study the photosynthetic eco-physiological characteristics of Taxodium ascendens seedlings in the environment of the Three Gorges hydro-fluctuation belt. The four kinds of water treatments were: normal growth water condition (CK), light drought stress (T1), soil water saturation (T2), and soil submersion (T3). The results showed that different water treatments could effectively influence the content of the photosynthetic pigment, leaf gas exchange and apparent resources use efficiency of T. ascendens seedlings. It was also demonstrated that the T. ascendens seedlings could not only tolerate water submersion and wet conditions but also endure a certain degree of drought. To establish a protection forest system in the hydro-fluctuation belt in the Three Gorges Reservoir Area, the species T. ascendens is suitable for planting in conditions of root submersion or water-saturated soil. In case it is planted in drought conditions, this tree species should be watered appropriately in order to keep its normal net photosynthetic rate.

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Section: Discussionmentioning

confidence: 97%

Photosynthetic physio-response of Taxodium ascendens seedlings to different soil water gradients

Zhong

2007

Front. Forest. China

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“…Por exemplo, raízes adventícias de Senna reticulata alcançaram 150 cm em 4 meses sob inundação parcial (Parolin 2001). Embora a produção de massa de raízes adventícias foi pequena, possivelmente tiveram grande importância do ponto de vista funcional, pois essas raizes promovem a entrada de oxigênio e nutrientes necessários para as folhas e para a raiz primária durante a fase aquática (De Simone et al, 2003).…”

Section: Discussionunclassified

“…Por outro lado, outros mecanismos como o desvio do metabolismo aeróbio para anaeróbio, redução da taxa metabólica, produção de açúcares, antioxidantes e hormônios são adaptações para tolerar o déficit de oxigênio. Maiores detalhes podem ser encontrados em Joly e Crawford (1982), Worbes et al (1992), Crawford e Brändle (1996), Vartapetian e Jackson (1997), Pimenta et al (1998), Waldhoff et al (1998), De Simone et al (2003, Rengifo et al (2005), Oliveira-Wittmann (2007), Ferreira et al (2007Ferreira et al ( e 2009 e Parolin (2009).…”

Section: Introductionunclassified

Efeito da inundação de longa duração sob o crescimento de Pouteria glomerata (Sapotaceae), uma arbórea da várzea da Amazônia Central

2009

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RESUMOPara entender a ocorrência de P. glomerata na várzea amazônica, investigamos as respostas morfo-fisiológicas a longo período de inundação. Durante seis meses, plântulas de P. glomerata foram submetidas a dois tratamentos de inundação (parcial e total) para análise da assimilação fotossintética líquida (A), eficiência quântica do fotosistema II (referido como Fv/Fm), altura, número de folhas, diâmetro do colo do caule (DCC), área foliar e biomassa da planta. Encontramos um decréscimo da atividade de trocas gasosas, das taxas de crescimento e danos foliares com o aumento do nível de inundação. Após seis meses de experimento, a área foliar, a biomassa dos órgãos vegetativos (raiz, caule e folha) e a biomassa total das plântulas inundadas foram menores que das plântulas controle, plântulas não-inundadas. De acordo com o aumento do nível de inundação, a biomassa fotoassimilada foi alocada principalmente para o caule. Somente área foliar específica, razão raiz / parte aérea e massa seca de raiz não apresentaram diferenças entre os tratamentos. As plântulas totalmente inundadas foram fortemente comprometidas, demonstrando ser esta à condição mais crítica para a manutenção do metabolismo fisiológico. P. glomerata foi afetada pelo longo período de inundação, no entanto a espécie revela adaptações morfo-fisiologica que justifica a sua ocorrência em florestas de várzea. PALAVRAS-CHAVE:Assimilação fotossintética, eficiência quântica do fotossistema II, biomassa, tolerância e plasticidade fenotípica. Growth of Pouteria glomerata (Sapotaceae), a tree species from the Central Amazonian floodplain, under long-term flooding ABSTRACTTo understand the occurrence of P. glomerata in the Amazonian várzea we investigated the morpho-physiological responses to long-term flooding. Seedlings of P. glomerata were subjected to two flooding treatments (partial and total) for six months. Following flooding treatments, we examined light-saturated photosynthesis (A), the potential quantum yield of photosystem II (inferred as the Fv/Fm ratio), height, number of leaves (NF), stem diameter at the base of the plant (DCC), leaf area and plant biomass. We found a decrease in gas exchange parameters and growth rates, whereas leaf damage increased with flooding. After six months of flooding, leaf area, and the total plant biomass as well as the biomass of the vegetative organs (leaf, stem and root) were lower in flooded seedlings than in control, non-flooded plants. As flooding level increased assimilated carbon was mainly allocated to stems. However, flooding treatments had no significant effect on specific leaf area, the root/shoot ratio and dry mass of roots. Totally submerged roots of flooded seedlings were strongly affected, showing to be the most critical condition for maintenance of physiological metabolism. P. glomerata was affected by long-term flooding. Thus, P. glomerata exhibited adjusts morpho-fisiological which makes it possible for this species to occur in the Amazon floodplain forest.KEY WORDS: Photosynthetic assimilation, quantum...

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“…In general, plant adaptations to flooding and drought include stomatal closure, decreases in net photosynthetic rate, and adaptive metabolic change (De Simone et al 2003;Jackson and Colmer 2005;Kozlowski 2002). In plant metabolic adaptation, malate and shikimate, two end-products of photosynthesis (Martinoia and Rentsch 1994;Wilson et al 1998), are known to play prominent roles (Crawford and Tyler 1969;Denison 1998;Galvez et al 2000;Lance and Rustin 1984;Patonnier et al 1999;Payne and Edmonds 2005;Schulze et al 2002).…”

Section: Introductionmentioning

confidence: 98%

Comparative studies on physiological and biochemical adaptation of Taxodium distichum and Taxodium ascendens seedlings to different soil water regimes

Zhong

Geng

et al. 2009

Plant Soil

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Central Amazon Floodplain Forests: Root Adaptations to Prolonged Flooding

Cited by 28 publications

References 48 publications

Photosynthetic physio-response of Taxodium ascendens seedlings to different soil water gradients

Photosynthetic physio-response of Taxodium ascendens seedlings to different soil water gradients

Efeito da inundação de longa duração sob o crescimento de Pouteria glomerata (Sapotaceae), uma arbórea da várzea da Amazônia Central

Comparative studies on physiological and biochemical adaptation of Taxodium distichum and Taxodium ascendens seedlings to different soil water regimes

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