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Discovery of the first succulent bamboo ( Poaceae , Bambusoideae ) in a new genus from Laos’ karst areas, with a unique adaptation to seasonal drought

Authors
  • Haevermans, Thomas1
  • Mantuano, Dulce1, 2
  • Zhou, Meng-Yuan3
  • Lamxay, Vichith4
  • Haevermans, Agathe1
  • Blanc, Patrick
  • Li, De-Zhu3
  • 1 Sorbonne Université, Paris, France , Paris (France)
  • 2 National University of Laos, Vientiane, Lao People's Democratic Republic , Vientiane (Laos)
  • 3 Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil , Rio de Janeiro (Brazil)
  • 4 Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China , Kunming (China)
Type
Published Article
Journal
PhytoKeys
Publisher
Pensoft Publishers
Publication Date
Aug 21, 2020
Volume
156
Pages
125–137
Identifiers
DOI: 10.3897/phytokeys.156.51636
PMID: 32913413
PMCID: PMC7455575
Source
PubMed Central
Keywords
Disciplines
  • Asia
  • Laos
License
Unknown

Abstract

Lush jungle flagship species, woody bamboos ( Poaceae – Bambusoideae ) are famed for their synchronous flowering as well as the extensive “bamboo forests” some species can form in tropical or temperate environments. In portions of their natural distribution, Bambusoideae members developed various adaptations to seasonality in environmental parameters, such as frost or seasonal drought. A new taxon, Laobambos calcareus , described here, is extremely novel in showing the first documented case of succulence in bamboos, with its ability to seasonally vary the volume of its stem depending on the quantity of water stored. Anatomical studies presented in this paper document this specificity at the cellular level. Though no flowers or fruits are known yet, unique morphological characteristics along with an investigation of its phylogenetic affinities using molecular data show that this new taxon should belong to a new genus herein described.

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