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Leaf anatomy as an aid to the taxonomy of the ‘babassu’ complex (Attalea species)

OAR@ICRISAT

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Relation http://oar.icrisat.org/12353/
https://www.sciencedirect.com/science/article/abs/pii/S0367253022000895
https://doi.org/10.1016/j.flora.2022.152092
 
Title Leaf anatomy as an aid to the taxonomy of the ‘babassu’ complex (Attalea species)
 
Creator Mata, L R
Moreira, A L C
Pinedo, A S
Gomes, S M
Azevedo, V C R
 
Subject Sustainable Agriculture
Germplasm
 
Description The taxonomy of Attalea is still not mutually agreed upon by taxonomists. Since leaf anatomy is a useful tool to differentiate palm groups that are difficult to distinguish, this study aimed to check the taxonomic value of leaf anatomy of seven Attalea species, and estimate the genetic distance among the studied species. Samples were gathered in the Brazilian states of Maranhão, Tocantins, Bahia and Minas Gerais, and permanent slides were assembled following the classical plant anatomy protocol. All species presented uniseriate epidermis, glandular scars, tetracytic stomatal complex, expansion tissue with three cell layers and dorsiventral mesophyll. Attalea barreirensis was the only amphistomatic species, due to the constant fluctuation in soil moisture. The hypodermis was thinner in A. maripa, which is consistent with the humid habitats where the species occurs. In A. barreirensis and A. eichleri the distinction between palisade and spongy parenchyma was not so clearly seen, characterizing a gradual dorsiventral mesophyll. The distinct shapes of the margin and the main vascular bundle of the segments, as well as the number of palisade parenchyma layers, were important diagnostic features. The arrangement of vascular bundles and their connection with the hypodermis varied within the same species. Attalea barreirensis, A. eichleri and A. vitrivir had many anatomical features in common, which separated them from the remaining studied species. Leaf anatomy of the seven species was informative, and an anatomical identification key is provided.
 
Publisher Elsevier
 
Date 2022-06-07
 
Type Article
PeerReviewed
 
Identifier Mata, L R and Moreira, A L C and Pinedo, A S and Gomes, S M and Azevedo, V C R (2022) Leaf anatomy as an aid to the taxonomy of the ‘babassu’ complex (Attalea species). Flora, 293. ISSN 0367-2530