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      Crescimento inicial de Piptadenia gonoacantha (Leguminosae, Mimosoideae) sob inundação em diferentes níveis de luminosidade Translated title: Initial growth of Piptadenia gonoacantha (Leguminosae, Mimosoideae) under flooding and different light conditions

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          Abstract

          Este estudo aborda aspectos ecológicos da inundação em plântulas de Piptadenia gonoacantha, uma espécie ocorrente em Matas de Galeria. O crescimento de plântulas com cinco meses de idade foi avaliado em duas condições de solo (capacidade de campo e inundado) combinados com três níveis de luz solar (100%, 70% e 40%). A inundação reduziu o crescimento aéreo e radicial das plântulas. Não houve interação entre luz e inundação, exceto para massa seca foliar aos 60 dias e razão parte aérea/raiz aos 20 dias. Plântulas inundadas a pleno sol apresentaram massa seca foliar aos 60 dias cerca de 67% menor que aquelas inundadas sombreadas. A razão parte aérea/raiz de plântulas inundadas foi significativamente maior aos 60 dias. Plântulas inundadas produziram lenticelas hipertrofiadas na base do caule, a partir dos 20 dias, em todos os níveis de luz. Além disso, a inundação induziu a decomposição das raízes e raízes adventícias não foram observadas. Após 60 dias de inundação, plântulas de P. gonoacantha apresentaram 100% de sobrevivência sem sintomas significantes de injúria na parte aérea.

          Translated abstract

          This study focus on ecological aspects of flooding on five month old seedlings of Piptadenia gonoacantha, a Gallery forest species. Seedling growth rates were evaluated on three levels of sun light (100%, 70% and 40%) and two soil moisture conditions (field capacity and flooded). Flooding reduced aerial and root growth. There was no interaction between light intensity and flooding, except for foliar dry matter (60 days) and top/root ratio (20 days). Full sun light seedlings under flooding had 67% lower foliar dry matter production than shaded ones, after 60 days. Flooded seedlings in all three light levels, had hypertrophic lenticels on submerged stems, after 20 days. In additon, flooding induced root decomposition but no adventicious roots were observed. After 60 days of flooding, seedlings of P. gonoacantha presented 100 % survival and no significant injury on the top portion.

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          Most cited references19

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          Espécies florestais brasileiras, recomendações silviculturais, potencialidades e uso da madeira

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            Some physiological and growth responses of Betula papyrifera seedlings to flooding

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              Flooding and Plant Growth

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbb
                Brazilian Journal of Botany
                Braz. J. Bot.
                Sociedade Botânica de São Paulo (São Paulo )
                1806-9959
                December 2001
                : 24
                : 4 suppl
                : 561-566
                Affiliations
                [1 ] Universidade de Brasília Brazil
                [2 ] Embrapa Cerrados Brazil
                Article
                S0100-84042001000500011
                10.1590/S0100-84042001000500011
                5953a403-778c-4f9e-97b4-9e57ce74895b

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-8404&lng=en
                Categories
                PLANT SCIENCES

                Plant science & Botany
                Gallery Forest,flooding tolerance,irradiance,Piptadenia gonoacantha
                Plant science & Botany
                Gallery Forest, flooding tolerance, irradiance, Piptadenia gonoacantha

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