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Photosynthesis and nitrogen allocation in needles in the sun and shade crowns of hybrid larch saplings: effect of nitrogen application
| Title: | Photosynthesis and nitrogen allocation in needles in the sun and shade crowns of hybrid larch saplings: effect of nitrogen application |
| Authors: | Mao, Q. Z. Browse this author | | Watanabe, M. Browse this author | | Imori, M. Browse this author | | Kim, Y. S. Browse this author | | Kita, K. Browse this author | | Koike, T. Browse this author →KAKEN DB |
| Keywords: | foliar nutrient | | hybrid larch | | nitrogen deposition | | sun- and shade needles |
| Issue Date: | Sep-2012 |
| Publisher: | Springer Netherlands |
| Journal Title: | Photosynthetica |
| Volume: | 50 |
| Issue: | 3 |
| Start Page: | 422 |
| End Page: | 428 |
| Publisher DOI: | 10.1007/s11099-012-0049-z |
| Abstract: | We studied the effects of applying 50 kg(N) ha^[-1] year^[-1] of nitrogen (N) on needle photosynthesis, N allocation and nutrient content in the sun and shade crowns of the hybrid larch F1 (Larix gmelinii var. japonica x L. kaempferi). The light-saturated net photosynthetic rate (P_[Nmax]) was not significantly affected by N application or crown position, although the contents of N, P, K, and chlorophyll (Chl), and the maximum rates of carboxylation and electron transport were lower in needles of the shade crown than of the sun crown. This difference was mainly due to an increase in the intercellular CO2 concentration (Ci) in the needles of the shade crown. Analysis of N allocation in photosynthetic systems revealed that more N was allocated to functions related to electron transport and ribulose-1,5-bisphosphate (RuBP) regeneration in needles of the shade crown. N allocation in needles of the hybrid larch F1 was regulated mainly by the light conditions, rather than by N application. |
| Rights: | The final publication is available at www.springerlink.com |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/50087 |
| Appears in Collections: | 農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 毛 巧芝 (Mao Qiao-Zhi)
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