: This study was investigated to compare the volatile aroma compounds of Synurus deltoides and Aster scaber. The volatile aroma compounds from Synurus deltoides and Aster scaber were extracted by soild-phase microextraction (SPME) methods. S. deltoides had 97 volatile aroma compounds such as including 5-acetyl-1,2-dihydro acenaphtylene (14.63%), β-cubebene (9.31%), caryophyllene (8.97%), β-chamigrene (7.14%), β-selinene (2.71), α-farnesene (2.47%), α-bergamotene (2.26%), β-elemene (1.94%), etc. A. scaber had 84 volatile aroma compounds such as (+)-epi-bicyclosesquiphellandrene (10.38%), terpinolen (10.09%), caryophyllene (6.04%), 8-isopropenyl-1,5-dimethyl-1,5-cyclodeca diene (5.42%), α-himachalene (5.04%), β-thujene (4.37%), β-pinene (4.28%), β-cubebene (3.99%), etc. Conclusively, the main common volatile aroma compounds in S. deltoides and A. scaber leaves were 19 volatile aroma compounds such as caryophyllene, terpinolen, β-cubebene. But the composition and amount of volatile aroma compounds were very different between the two species.Key Words : Volatile Aroma, Synurus deltoides, Aster scaber, SPME
RESUMO: Devido ao alto consumo do palmito da guariroba na região do cerrado, estudo sobre o cultivo da guariroba se faz necessário. O objetivo foi determinar as características anatômicas entre as faces adaxial e abaxial das folhas de guariroba quando cultivada em condição de baixa disponibilidade hídrica. Adotou o delineamento em blocos ao acaso analisado em esquema fatorial 2 x 6. Os tratamentos consistiram da combinação dos fatores faces das folhas (adaxial e abaxial) e de seis tempos de estresse hídrico (TE). Os estresses hídricos em que as mudas foram submetidas corresponderam a 25, 50 e 75% da capacidade de água disponível no solo. Foram aferidas as espessuras da epiderme de ambas as faces, mesofilo e densidade estomática. Para espessura de epiderme na superfície adaxial e abaxial, e espessura do mesofilo foliar, não houve diferenças significativo para estas variáveis estudadas em função do efeito do estresse hídrico. Já para a densidade estomática verificou-se diferença significativa entra as faces da folha em todos os tempos de estresse e para todos os estresses hídricos aplicados.
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