Picea likiangensis

Picea likiangensis (Franchet) E. Pritzel

Languages: English

Overview

General Description

Trees to 50 m tall; trunk to 2.5 m d.b.h.; bark dull gray or brown-gray, breaking into thick, irregular plates; crown pyramidal; branchlets initially pale yellow or brownish yellow, finally gray or gray-yellow, often sparsely pubescent, rarely with glandular hairs; winter buds brown, conical, ovoid, or globose, resinous, scales not reflexed, or slightly opening at base of branchlets. First-year branchlets usually slender, with nodes of normal length, sparsely pubescent. Leaves directed forward on upper side of branchlets, spreading on lower side, linear, straight or slightly curved, ± broadly rhombic in cross section or subflattened, 0.6-1.5 cm long, 1-1.5 mm wide, stomatal lines 4-7 along each surface adaxially, 2-4 along each surface abaxially, apex acute or obtuse. Seed cones red-brown or black-purple, maturing brown to reddish or blackish, ovoid-oblong or ovoid-cylindric, 7-12 cm. Seed scales at middle of cones rhombic-ovate, 1.5-2.6 × 1-1.7 cm, base cuneate, margin denticulate or undulate, apical part narrowed into a triangular or obtusely triangular point. Seeds gray-brown, subovoid, 0.7-1.4 cm including wing; wing pale brown, lustrous, usually with purplish spots, obovate-oblong.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Conservation

Threats

Picea likiangensis is reported be lower risk/least concern (Conifer Specialist Group, 1998).

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Description

Genetics

The chromosomal number of Picea likiangensis is 2n = 24 (Shi and Wang, 1994).

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Ecology and Distribution

Cyclicity

Pollination from April to May; Seed maturity from September to October.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Distribution

Picea likiangensis is occurring in SW Sichuan, SE Xizang, NW Yunnan of China, Bhutan.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Evolution

The within-species genetic diversity and phylogenetic relationships of Picea likiangensis were investigated using polymorphic DNA (RAPD) markers in the Qinghai-Tibetan region (Peng et al., 2007). Results suggest that this species has high overall genetic diversity, with 85.42% of loci being polymorphic and an average expected heterozygosity (H E) of 0.239. However, there were relatively low levels of polymorphism at population levels and the differences between populations were not significant, with percentages of polymorphic bands (PPB) ranging from 46.88 to 69.76%, Nei’s gene diversity (H E) from 0.179 to 0.289 and Shannon’s indices (Hpop) from 0.267 to 0.421. In accordance with proposed hypothesis, a high level of genetic differentiation among populations was detected based on Nei’s genetic diversity (G ST = 0.256) and AMOVA analysis (Phi st = 0.236). Gene flow between populations was found to be limited (Nm = 1.4532) and far lower than reported for other conifer species with wide distribution ranges from other regions. No clusters corresponding to three morphological varieties found in the south, north and west, respectively, were detected in either UPGMA or PCO analyses. Results suggest that this species may have had different refugia during the glacial stages in the southern region and that the northern variety may have multiple origins from these different refugia.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Habitat

Growing in mountains, river basins; 2500-3800 m.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Relevance

Uses

The timber of Picea likiangensis is used for construction, machines, poles, furniture, and wood pulp. The bark is used for producing tannin, the trunk for resin, and the leaves for aromatic oils.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Taxonomy

  • Abies likiangensis Franchet (synonym)
  • Picea yunnanensis Lacassagne (synonym)

References

Group, C S. (1998).  Picea likiangensis. IUCN Red List of Threatened Species.
Peng, X. L., Zhao C. M., Wu G. L., & Liu J. Q. (2007).  Genetic variation and phylogeographic history of Picea likiangensis revealed by RAPD markers. Trees. 21,
Shi, D. X., & Wang M. I. (1994).  Karyomorphological studies of 6 species in genus Picea. Acta Botanica Yunnanica. 16,