The effect of irrigation regime on biomass and resin production in Grindelia chiloensis |
| |
| Institution: | 1. College of Plant Science and Technology, Beijing Key Laboratory for Agricultural Application and New Technique, Beijing Collaborative Innovation Center for Eco-environmental Improvement with Forestry and Fruit Trees, Beijing University of Agriculture, Beijing 102206, China;2. Department of Ornamental Horticulture, China Agricultural University, Beijing 100193,China;1. University of Louisiana at Lafayette, School of Geosciences, Lafayette, LA 70504, USA;2. University of Hawaii at Mānoa, International Pacific Research Center and Department of Oceanography, Honolulu, HI 96822, USA;1. Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China;2. University of Chinese Academy of Sciences, Beijing 10049, China;3. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China.;4. Institute of Geography, Friedrich-Alexander-University of Erlangen-Nuremberg, Wetterkreuz 15, 91058 Erlangen, Germany;5. Central Department of Hydrology and Meteorology, Tribhuvan University Kirtipur, Kathmandu, Nepal;1. School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia;2. Research School of Biology, The Australian National University, Acton, ACT 2601, Australia;3. Kings Park and Botanic Garden, The Botanic Gardens and Park Authority, West Perth, WA 6005, Australia;4. Department of Ecology, Environment & Evolution, La Trobe University, Victoria 3086, Australia |
| |
| Abstract: | Grindelia chiloensis (Corn.) Cabr. is a shrub native to Patagonia, Argentina and can accumulate as much as 25% resin in its leaves, with net primary productivity between 90 and 170 g per year per plant when growing in native stands. Under cultivation, 67.4 g of resin per plant have been produced (about 2.24 Mg ha−1). The objective of this study was to assess the effect of irrigation regime on biomass and resin production on G. chiloensis. In order to achieve this objective, four irrigation treatments were performed during 1996–1997 and 1997–1998: (i) weekly irrigation (7d), (ii) irrigation at 20-day intervals (20d), (iii) irrigation at 40-day intervals (40d), (iv) non-irrigated (N-I). It was found that the intermittent water supply at 40d was sufficient to promote canopy development, and increase water use efficiency (WUE) and resin production per plant (RP) with highest resin production (approximately 5.12 Mg ha−1 in 1997). In order to achieve high levels of RP, above ground biomass was maximized at the expense of a reduction in WUE. A concomitant increase in WUE (at the leaf level; WUEL) and leaf resin content with water stress and time was found. This result supports the hypothesis that epicuticular resin could influence water transpiration (E), as it represents an additional barrier to gas diffusion from the epidermis and through the stomatal pores. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
