文献类型：期刊文献

英文题名：Roots originating from different shoot parts are functionally different in running bamboo, Phyllostachys glauca

作者：Wang, Guangru[1,2,3] Yu, Fen[1,3] Wu, Hongyan[1,3] Hu, Shuzhen[1,3] Wu, Shujin[1,3] Pei, Nancai[4] Shi, Jianmin[1,3] Lambers, Hans[5]

第一作者：Wang, Guangru

通信作者：Shi, JM[1];Shi, JM[2]

机构：[1]Jiangxi Agr Univ, Coll Forestry, Nanchang, Jiangxi, Peoples R China;[2]Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang, Peoples R China;[3]Jiangxi Prov Key Lab Bamboo Germplasm Resources &, Nanchang, Jiangxi, Peoples R China;[4]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou, Peoples R China;[5]Univ Western Australia, Sch Biol Sci, Perth, WA, Australia

年份：0

外文期刊名：FUNCTIONAL ECOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000914013800001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 32060380, 31660198 and 31960336; Talent Training Project of Major Academic and Technical Leaders of Jiangxi Province, Grant/Award Number: No. 20225BCJ22006

语种：英文

外文关键词：anatomy structure; anchorage; clonal growth; phosphorus uptake; resource acquisition; root; architecture; root morphology; tensile strength

摘要：1. Running bamboos are a group of clonal plants exhibiting rapid and widespread expansion. They possess two root subsystems, arising from different shoot parts, culm roots and rhizome roots. To date, it remains unclear what the functional differences are between the two root subsystems and what their relation is to the remarkably competitive ability of running bamboos. 2. A typical running bamboo, Phyllostachys glauca, which dominates in a highly heterogeneous habitat of limestone hills, was sampled to compare the morphology, architecture, anatomy, chemical composition, mechanics and nutrient acquisition of the two root subsystems to explore their differences in functional traits. 3. Compared with rhizome roots, culm roots possessed greater tensile strength, modulus of elasticity, stele diameter to root diameter ratio, root tissue density, root length density, rooting depth, basal diameter of shoot--borne roots and more lignified cells. Culm roots also had a higher phosphorus (P) concentration (>0.4 mg g(-1)), which was nearly twice that of rhizome roots. By contrast, rhizome roots exhibited a greater specific root area, specific root length, cortex thickness to root radius ratio, total branch order and greater P--uptake capacity than culm roots. 4. Our findings revealed distinct differences in functional traits between culm roots and rhizome roots in P. glauca. Culm roots are considered to primarily provide anchorage, but also function in resource acquisition and nutrient storage, while rhizome roots mainly play a role in resource acquisition. Except for the anchorage and resource acquisition of culm roots, the extra resource acquisition by rhizome roots and the high concentration of a limiting nutrient (P) in culm roots enhance the performance in a highly heterogeneous habitat which offers a physiological explanation for P. glauca dominating on limestone hills. 5. The functional differentiation between culm roots and rhizome roots provides insight into the mechanism underpinning the remarkable expansion of running bamboos and offers a new perspective to explain the strong competitive ability of clonal plants with dimorphic roots.