Voltolini & Santos 2011 (Article) Aechmea, leaf [Spanish]
Leaf morphoanatomy variation in Aechmea lindenii (E. Morren) Baker var. lindenii (Bromeliaceae) under distinct environmental conditions
Author(s):—C. Voltolini & M. Santos
Publication:—Acta Bot. Bras. 25 : 2-10. (2011) — DOI
Spanish title:—Variações na morfoanatomia foliar de Aechmea lindenii (E. Morren) Baker var. lindenii (Bromeliaceae) sob distintas condições ambientais
Abstract:—Aechmea lindenii (E. Morren) Baker var. lindenii (Bromeliaceae-Bromelioideae) occurs in restingas and hillside Atlantic rain forest in Santa Catarina and northeastern Rio Grande do Sul, Brazil. It is found totally or partially exposed to solar radiation and in different life forms - terricolous, rupicolous and epiphytes. The aim of this work was to compare morphoanatomical leaf characteristics of A. lindenii var. lindenii in distinct environmental conditions. On Santa Catarina Island (Florianópolis, SC), the following were collected: leaves of terricolous plants in the herbaceous restinga (high solar radiation), rupicolous from rocky coast (high solar radiation), terricolous and understory epiphytes (low solar radiation) in the arboreal restinga and understory rupicolous (low solar radiation) from hillside Atlantic rain forest. We measured length, breadth and area of leaf blade and sheath, stomatal density, length and breadth of guard-cells; width of leaf blade and structural components. Qualitative anatomical characteristics are similar in the distinct conditions analyzed. Low solar radiation determined greater expansion of the leaf area, due to stretching of the blade. Leaf blade and sheath have greater breadth under high solar radiation. Stomatal density was greater in leaves of plants in high solar radiation. Total blade leaf width was smaller in leaves of terricolous plants under high solar radiation, nevertheless, statistically significant differences were not found among other conditions.
Keywords:—Responses to solar radiation, restinga; Atlantic rain forest; life forms