02292nab a2200289 i 4500003000900000005001700009008004100026040001800067072001400085072000800099072000800107100003900115100002800154100003000182100002400212100005100236245010500287500007000392520119100462650001701653650001201670650002301682773018901705856008101894942000801975999001901983BR-BrBNA20260407050101.0260407b2019    bl.qr|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aF61b2322  aF62  aK10  aMendonça, Ane Marcela das Chagas  aLira, Jean Marcel Sousa  aMelo, Nayara Cristina de   aRodrigues, Marcelo   aBarbosa, João Paulo Rodrigues Alves Delfino   aPhenotypic Plasticity of Pimenta pseudocaryophyllus (Gomes) Landrum Under Different Light Conditions  aPublicação on-line; 43 ref.; 4 tables; 2 illus.; Summary (En)  a

ABSTRACT

The heterogeneous light pattern in forest environments leads to specific morphological and
physiological responses. However, anthropogenic pressures in areas such as Atlantic Forest and
Cerrado are modifying the light availability, and consequently the forest community composition.
The aim of this study was to investigate the plasticity of forest species Pimenta pseudocaryophyllus
under full sunlight and shade conditions. P. pseudocaryophyllus showed typical shade plant
phenotype, with higher net photosynthesis, transpiration, and chlorophyll a and b contents
when cultivated under this condition. The decrease in net photosynthesis under full sunlight
conditions is probably related to PSII photoinhibition. In addition, under full sunlight, reduced
height, number of leaves, and specific leaf area was observed, while plants in shade increased
these characteristics. P. pseudocaryophyllus did not show high morphological and physiological
plasticity, which may be a maladaptive response. It was concluded that forest disturbances could
compromise the occurrence and survival of P. pseudocaryophyllus.

Keywords: initial growth, RDPI, full sunlight, shade, pau-cravo.  aCRESCIMENTO   aPIMENTA  aRADIAÇÃO SOLAR0 029299347952dRio de Janeiro-RJ Instituto de Florestas - UFRRJ 1994o2025-0451tFloresta e Ambiente (Brazil)x1415-0980  /  ISSN 2179-8087 0nlinegv. 26(3) p. 1-8; (2019)wBR2026000287  uhttps://www.scielo.br/j/floram/a/CVQYTRKGV88MPzQCcSCtSyc/?format=pdf&lang=en  cANA  c341254d341254