J Syst Evol ›› 2017, Vol. 55 ›› Issue (3): 192-199.doi: 10.1111/jse.12240

• Research Articles • Previous Articles     Next Articles

Pollen limitation, plasticity in floral traits, and mixed mating system in an alpine plant Pedicularis siphonantha (Orobanchaceae) from different altitudes

Wen-Kui Dai1,2, Edwin Luguba Kadiori1,2, Qing-Feng Wang1*, and Chun-Feng Yang1*   

  1. 1Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
    2College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
  • Received:2016-09-06 Online:2017-01-23 Published:2017-05-12

Abstract: Plant mating systems rapidly respond to pollen limitation in changing environments. However, whether and how floral traits are involved in a mating system shift requires further investigation. A widely distributed and bumblebee-pollinated lousewort, Pedicularis siphonantha D. Don was studied. We investigated pollination systems, reproductive success, and floral traits in four large populations growing from 3200 m to 4300 m. Pollinator activity in low altitude populations was lower and these populations had a decreased fruit set and seed number per capsule compared to populations at high altitudes. Supplemental hand pollination with outcross pollen significantly increased seed production per capsule for plants from high altitudes but not for those from lower altitudes. We also found that bumblebees visited more flowers within an inflorescence in a single foraging bout in high altitudes compared with low altitudes, which caused a high possibility of geitonogamous mating. These differences may be pollination-dependent rather than inheritance-based because hand pollination on bagged flowers did not cause a difference in seed production across populations. Compared to plants from low altitudes, high-altitude plants had increased flower longevity, larger floral displays, higher pollen production per flower, and shorter corolla tubes, which were found to be well in accordance with changes in both pollination environment and mating system. Plasticity in floral traits might help plants to adjust their resource allocation strategies in response to their habitat, which might be linked with pollination environment. The variability among these populations might be beneficial for this widely distributed species to cope with environmental changes.

Key words: altitude, bumblebee, floral traits, mixed mating system, Pedicularis siphonantha, plasticity

[1] Xing-Nan Zhao, Ji-Min Zhao, Ji-Xun Guo, Yan-Wen Zhang. Temporal variation in relative frequency of nectariferous and nectarless inflorescences and its effect on subsequent fecundity in an ephemeral plant, Corydalis ambigua (Fumariaceae) . J Syst Evol, 2017, 55(1): 44-53.
[2] Jutta C. BURGER, Norman C. ELLSTRAND. Rapid evolutionary divergence of an invasive weed from its crop ancestor and evidence for local diversification . J Syst Evol, 2014, 52(6): 750-764.
[3] Wen GUO, Lin-Lin WANG, Shan SUN, Yong-Ping YANG, Yuan-Wen DUAN. Sexual interference in two Chamerion species with contrasting modes of movement herkogamy . J Syst Evol, 2014, 52(3): 355-362.
[4] Li-Hui ZHANG, Yan-Wen ZHANG, Xing-Nan ZHAO, Sheng-Jun HUANG, Ji-Min ZHAO, Yun-Fei YANG. Effects of different nutrient sources on plasticity of reproductive strategies in a monoecious species, Sagittaria graminea (Alismataceae) . J Syst Evol, 2014, 52(1): 84-91.
[5] Wen-Bin YU, De-Zhu LI, Hong WANG. Highly efficient pollination by bumblebees ensures seed production in Pedicularis lachnoglossa (Orobanchaceae), an early-flowering Himalayan plant . J Syst Evol, 2012, 50(3): 218-226.
[6] Hong YAO, Yi-Bo LUO. Pollen limitation and variation in floral longevity in gynodioecious Potentilla tanacetifolia . J Syst Evol, 2011, 49(6): 539-545.
[7] Tao ZHANG; Dun-Yan TAN *. Adaptive significances of sexual system in andromonoecious Capparis spinosa (Capparaceae) . J Syst Evol, 2008, 46(6): 861-873.
[8] Le-Xuan GAO, Jia-Kuan CHEN, Ji YANG. Phenotypic plasticity: Eco-Devo and evolution . J Syst Evol, 2008, 46(4): 441-451.
[9] ZHANG Ting-Feng, DUAN Yuan-Wen, LIU Jian-Quan. Pollination ecology of Aconitum gymnandrum (Ranunculaceae) at two sites with different altitudes . J Syst Evol, 2006, 44(4): 362-370.
[10] Ge Song, Hong De-yuan. Biosystematic Studies on Adenophora potaninii Korsh. Complex (Campanulaceae). Ⅰ. Phenotypic Plasticity . J Syst Evol, 1994, 32(6): 489-503.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] CHEN Xue-Hao YU Jie LI Ling-Li T. Advances in Study on Polyamines During Flowering and Fruit Setting and Development in Higher Plants[J]. Chin Bull Bot, 2003, 20(01): 36 -42 .
[2] Nair. P.K.K.. The Palynological Basis for the Triphyletic Thory of Angiosperms[J]. Chin Bull Bot, 1985, 3(03): 29 -31 .
[3] Li Jing-shu. [J]. Chin Bull Bot, 1988, 5(03): 187 -191 .
[4] Suxia Yuan;Yumei Liu*;Zhiyuan Fang;Limei Yang;Mu Zhuang;Yangyong Zhang;Peitian Sun. Plant Regeneration from Microspore-derived Embryos in Cabbage (Brassica oleracea var. capitata) and Broccoli (Brassica oleracea var. italica)[J]. Chin Bull Bot, 2010, 45(02): 226 -232 .
[5] Zhu Zhu;Xianghong Meng;Shiping Tian*. Effect of Preharvest Oxalic Acid Sprays on Calcium Content and Distribution in Mango Fruit Cells[J]. Chin Bull Bot, 2010, 45(01): 23 -28 .
[6] Liu Shi-rong, Wang Wen-zhang, Wang Ming-qi. The Characteristics of Energy in the Formative Process of Net Primary Productivity of Larch Artificial Forest Ecosystem[J]. Chin J Plan Ecolo, 1992, 16(3): 209 -219 .
[7] Gao Zhi-hui, Jiang Guo-hong, Xing Ai-jin, Yu Ming-rong. A Study on the Biomass of Metasequoia glyptostroboides plantation in Zhebei Plain[J]. Chin J Plan Ecolo, 1992, 16(1): 64 -71 .
[8] LU Zhan-Gen, ZHOU Wen-Jie, ZHAO Chang-Qiong, CHEN Jing, TAN Feng. Studies on the Adaptation of Taxus media cv. Hicksii to Natural Temperature Reduction[J]. Chin J Plan Ecolo, 2004, 28(1): 73 -77 .
[9] YU Yang, CAO Min, ZHENG Li, SHENG Cai-Yu. EFFECTS OF LIGHT ON SEED GERMINATION AND SEEDLING ESTABLISHMENT OF A TROPICAL RAINFOREST CANOPY TREE, POMETIA TOMENTOSA[J]. Chin J Plan Ecolo, 2007, 31(6): 1028 -1036 .
[10] SHEN Qi, LIU Ke, LI Shi-Yu, ZHANG Jun, JIANG Yue-Ping, GE Ying, CHANG Jie. RELATIONSHIPS OF PLANT COMPOSITION,WATER LEVEL AND SOLAR RADIATION IN XIXI WETLAND, HANGZHOU, CHINA[J]. Chin J Plan Ecolo, 2008, 32(1): 114 -122 .