The Photosynthetic Physiological Responses of Leaves from Different Shoots of Taxus Cuspidata to Elevated CO2

DOI

10.2991/lemcs-15.2015.297How to use a DOI?

Keywords

Taxus cuspidata; Annual shoot; Biennial shoot; CO2 concentration

Abstract

Net photosynthetic rate (PN), transpiration rate (E), stomatal conductance (Cond), intercellular CO2 concentration (Ci), and vapor pressure deficit on the surface (VPD) of Taxus cuspidata leaves set at a series of CO2 concentration were investigated with the LI-COR 6400 portable photosynthesis system. For the annual shoot and the biennial shoots and blades, both PN and E increased with the increase in CO2 concentration, but the increase in PN was larger than that in E. The maximal PN of the annual shoot (6.95 mol·m-2·s-1) was larger than that of the biennial shoot (6.87 mol·m-2·s-1) at a CO2 concentration as high as 1400*10-6. E of the annual shoot was slightly larger than the biennial shoot but with no big disparity. Water use efficiency (WUE=PN/E) of the annual and biennial shoots went up with CO2 concentration. WUE of the annual shoot was slightly higher than the biennial shoot, yet without significant disparity. The significant ascent of PN played a major role in the WUE of Taxus cuspidata going up with the elevated CO2 concentration.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Qige Qi
AU  - Lihua Zhong
AU  - Qichang Zhang
AU  - Xueting Zheng
PY  - 2015/07
DA  - 2015/07
TI  - The Photosynthetic Physiological Responses of Leaves from Different Shoots of Taxus Cuspidata to Elevated CO2
BT  - Proceedings of the International Conference on Logistics, Engineering, Management and Computer Science
PB  - Atlantis Press
SP  - 1494
EP  - 1498
SN  - 1951-6851
UR  - https://doi.org/10.2991/lemcs-15.2015.297
DO  - 10.2991/lemcs-15.2015.297
ID  - Qi2015/07
ER  -