首页|Root hemiparasitism in Malania oleifera (Olacaceae), a neglected aspect in research of the highly valued tree species

Root hemiparasitism in Malania oleifera (Olacaceae), a neglected aspect in research of the highly valued tree species

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Malania oleifera (Olacaceae) is a valued tree species, mostly because its seeds have high precious fatty acid content (particularly nervonic acid). However, seedling mortality rates are often high and regeneration of this tree has been problematic, which greatly hinders its utilization at a large scale. Cultivation difficulties of some tree species in the family Olacaceae have been attributed to their root hemiparasitic habit. Prompted by field observations and the taxonomic proximity of M. oleifera to root hemiparasites in Olacaceae, we hypothesized that tuberous structures observed on the roots of M. oleifera are parasitic organs known as haustoria. To test this hypothesis, we collected root samples from M. oleifera plants of various ages and growth conditions, investigated the morphological and anatomical features of tuberous structures and their connections to neighboring roots. Our analyses confirmed that M. oleifera are root hemiparasites. To the best of our knowledge, this is the first empirical report on root hemiparasitism in M. oleifera. Because life strategies of root hemiparasitic plants differ greatly from autotrophic plants, the root hemiparasitic habit needs to be taken into account for successful seedling regeneration of M. oleifera. This study establishes the foundation for investigations into a long-neglected but essential aspect in research of these highly valued tree species.

Malania oleiferaTuberous structuresHaustoriaRoot hemiparasitic plantsOlacaceae

Ai-Rong Li、Ping Mao、Yun-Ju Li

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Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China

Yunnan Key Laboratory for Conservation of Plant Species with An Extremely Small Population Size, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China

Guangnan Forestry and Grassland Bureau, Guangnan 663300, China

The State Phosphorus Resource Development and Utilization Engineering Technology Research Centre, Yunnan Phosphate Chemical Group Co. Ltd, Kunming, PR China

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Many thanks to Professor Aizhong Liu from Southwest Forestry University for discussion of problems encountered in cultivation ofresearch was financially supported by funding for Airong Li from Yunnan Ten Thousand Talents Plan Young and Elite Talents PrYouth Innovation Promotion Association of Chinese Academy of Sciencesand Young Academic and Technical Leader Raising Foundation of Yunnan Provincefunding for Yunju Li from Young Academic and Technical Leader Raising Foundation of Yunnan Provinceand Yunnan Science and Technology Innovation Team Program

YNWR-QNBJ-2018-09220112762014HB0472019HB060Grant No. 2019HC015

2019

植物多样性(英文)
中国科学院昆明植物研究所，中国植物学会

植物多样性(英文)

CSTPCDCSCDSCI
影响因子：0.617
ISSN：2096-2703
年,卷(期)：2019.41(5)
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