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Young plants of Eucalyptus dunnii Maiden and Eucalyptus benthamii Maiden & Cambage in different levels of black roof shading in nursery in Santa Catarina Mesoregion Highlands. (A) plants in 0% artifi cial shade; (B) plants with 50% shading; (C) plants with 80% shading.
Source publication
Eucalyptus dunnii Maiden e Eucalyptus benthamii Maiden & Cambage são espécies de interesse madeireiro cultivadas no Sul do Brasil, adaptadas ao clima frio. O crescimento inicial de plantas jovens é infuenciado pela luminosidade promovendo modifcações na morfoanatomia e fsiologia da folha. O objetivo do trabalho foi avaliar as modifcações morfofsiol...
Context in source publication
Context 1
... aumento do poro estomático em condições de maior luminosidade, como visto em E. benthamii, foram registrados em Quercus ilex e Phillyrea latifolia ( Gratani et al, 2006), e em Carapa guianensis Aubl. (Aragão et al., 2014). A redução nas dimensões estomáticas deve promover aumento da resistência à passagem de água por transpiração, mantendo a capacidade de captura de CO 2 e evitando um estresse hídrico em ambientes com maior luminosidade (Fermino Junior e Fockink, 2017), entretanto, espécies do mesmo gênero, como E. dunnii e E. benthamii, as estratégias adaptativas são distintas. ...
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Citations
... In plant micropropagation studies, the analysis of tissue phenotypic plasticity has not been reported. In studies of young plant growth at different levels of luminosity of Eucalyptus dunnii and Eucalyptus benthamii, also Myrtaceous, the highest phenotypic plasticity index occurs in stomatal density, palisade and spongy parenchyma and leaf blade (Bireahls;Fermino Junior, 2020). According to Valladarres, Sanchez-Gomez and Zavala (2006) are considered very plastic parameters with PI above 0.6 and nonplastic parameters close to zero. ...
... In plant micropropagation studies, the analysis of tissue phenotypic plasticity has not been reported. In studies of young plant growth at different levels of luminosity of Eucalyptus dunnii and Eucalyptus benthamii, also Myrtaceous, the highest phenotypic plasticity index occurs in stomatal density, palisade and spongy parenchyma and leaf blade (Bireahls;Fermino Junior, 2020). According to Valladarres, Sanchez-Gomez and Zavala (2006) are considered very plastic parameters with PI above 0.6 and nonplastic parameters close to zero. ...
Acca sellowiana (Berg) Burret is a fruit species native to southern Brazil and Uruguay. Micropropagation techniques have been developed in order to scale-up the mass propagation of new varieties. Micropropagated plants display anatomical, morphological and physiological changes, which may negativelly affect their initial development in the acclimatization phase. The objective of this work was to compare morphometric characteristics of leaf tissues in vitro culture system with natural and conventional ventilation, as well as during in vitro culture and the acclimatization phase. Stomatal density, stomatal length, pore length and chlorophyll contente were enhanced in the natural ventilation system. The stomatal density, xylem area perimeter, mesophyll, palisade and spongy parenchyma showed plasticity indicating greater adaptability in water and light relationships in the transition from in vitro to ex vitro culture. Index terms: Feijoa; gas exchange; micropropagation; leaf histology; stomata.
