Variation in oleoresin yield and anatomical traits among Sindora glabra populations in Hainan, China
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ORIGINAL ARTICLE
Variation in oleoresin yield and anatomical traits among Sindora glabra populations in Hainan, China Niu Yu1,2 · Qiongqiong Li1,2 · Jinchang Yang1,2 · Guangtian Yin1,2 · Rongsheng Li1,2 · Wentao Zou1,2 Received: 19 November 2019 / Accepted: 6 June 2020 © The Author(s) 2020
Key message Geography and tree diameter were the major factors in determining oleoresin yield in Sindora glabra. The tangential diameter and area of secretory canals are reliable indicators of the oleoresin amount. Abstract Sindora glabra is a native tropical plant of China that exudes copious amounts of oleoresin from wounds on the stem. Elucidation of the mechanism affecting the oleoresin yield is of particular importance for development and selection of superior germplasm. In this study, the variation in oleoresin yield and anatomical traits of the stem of S. glabra were investigated in four main natural populations in Hainan. The results showed that annual oleoresin yield varied considerably among populations. The oleoresin yield exhibited an increasing trend with the increment of tree stem diameter until the diameter was over 80 cm. Moreover, oleoresin production in the wet season was higher than in dry season. The analysis of oleoresin chemical composition indicated that the four populations belong to the same chemotype despite the amount of four types of sesquiterpenes varying greatly among areas. Anatomical analysis revealed that quantitative traits of secretory canals including tangential diameter, area, density and frequency were significantly different among populations and tree diameters. Furthermore, the tangential diameter and area of secretory canals were positively correlated with oleoresin yield. These results suggested that the tangential diameter and area of secretory canals are reliable indicators of the oleoresin amount and can be used for selection purposes in S. glabra. Keywords Oleoresin · Sesquiterpene · Secretory canal · Sindora glabra
Introduction Terpenes are one of the largest specialized metabolites in plants for self-protection (Lombardero et al. 2000; Bolutari et al. 2013; Tolera et al. 2013). Terpenes not only play important roles in ecosystems, but also are widely used in pharmaceuticals and fragrance industries. Most terpenes are extracted from plants due to their diversity and complexity which make it difficult to synthesize them. Therefore, it is Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00468-020-02000-y) contains supplementary material, which is available to authorized users. * Jinchang Yang [email protected] 1
Key Laboratory of State Forestry Administration on Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China
Research Institute of Tropical Forestry, Chinese Academy of Forestry, Number 682, Guang Shan Yi Road, Longdong District, Guangzhou 510520, China
2
becoming increasingly important to explore new plant species with abundant terpenes in addition to e
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