2011
DOI: 10.1590/s1516-05722011000400012
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Adaptações fisiológicas e anatômicas de Melissa officinalis L. (Lamiaceae) cultivadas sob malhas termorrefletoras em diferentes intensidades luminosas

Abstract: RESUMO:Objetivou-se, com a realização da pesquisa, avaliar modificações fisiológicas e anatômicas em plantas de melissa, cultivadas sob malhas termorrefletoras (Aluminet®), em diferentes níveis de sombreamento, visando conhecer a plasticidade fenotípica em resposta de adaptação a diferentes quantidades de luz. Os tratamentos foram caracterizados por plantas submetidas a pleno sol e a 20 e 60% de intensidade luminosa, e arranjados conforme o delineamento inteiramente casualizado (DIC). As quantificações de clor… Show more

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Cited by 16 publications
(10 citation statements)
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References 8 publications
(4 reference statements)
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“…The leaves of plants cultivated under high light incidence, such as in direct sunlight and using silver shade net, are usually thicker than leaves cultivated under the other shade nets (Brant et al 2011). High light intensity increases the thickness of abaxial epidermis and parenchyma (Brant et al 2011, Castro et. al.…”
Section: Resultsmentioning
confidence: 98%
“…The leaves of plants cultivated under high light incidence, such as in direct sunlight and using silver shade net, are usually thicker than leaves cultivated under the other shade nets (Brant et al 2011). High light intensity increases the thickness of abaxial epidermis and parenchyma (Brant et al 2011, Castro et. al.…”
Section: Resultsmentioning
confidence: 98%
“…The higher photosynthetic capacity (A max) in lemon balm plants under full sunlight was not converted into higher dry mass, possibly because the energy content may have been stored as starch in the leaves, as suggested by Brant et al (2011). In addition, plants subjected to the full sunlight treatment must develop mechanisms to avoid cell damage under high irradiance condition (Gonçalves et al, 2012), which may result in greater energy expenditure for maintenance of cellular structures, increased carbohydrate consumption and, as consequence, decreased dry mass accumulation.…”
Section: Resultsmentioning
confidence: 96%
“…This decrease may have been caused by the difference in the distribution of photoassimilates. At lower luminous intensity, the plants present thinner leaves due to the consumption of assimilated ones for the expansion of the leaf area (Brant, 2011). However, in plants under full sunlight, the growth of the cells in the elongation phase is reduced, and the expanding growth of the cell walls paralyzes early, tending to become thicker (Lima Júnior et al, 2006).…”
Section: Resultsmentioning
confidence: 99%