Proceedings of the 2018 8th International Conference on Management, Education and Information (MEICI 2018)

Response of Gas Exchange to Soil Drought in Old P. kangdingensis Cuttings of Section Tacamahaca Spach

Authors
Yanyuan Lu, Li Pan
Corresponding Author
Li Pan
Available Online December 2018.
DOI
https://doi.org/10.2991/meici-18.2018.113How to use a DOI?
Keywords
P. kangdingensis; Old tree; Drought resistance; Gas exchange
Abstract
In this paper, the cutting seedlings of P. kangdingensis, which age of 300-500 years old and diameter at breast height (DBH) was greater than 1m were used as experimental materials, and the anatomical structure of the leaves and stems of seedlings were studied by the method of paraffin section. The pot experiment was conducted by way of weighing to control water content in soil, that was to weigh the pot in every afternoon and supplement the consumption of water to keep it about 60% of the maximum field water capacity, and the control was kept about 80% of that. The water control test lasted for about 3 months. The water control test lasted for about 3 months, and gas exchange parameters were measured. The results showed that under drought treatment, the intercellular CO2 concentration (Ci), stomatal conductance (Gs), transpiration rate (Tr), net photosynthetic rate (Pn), water use efficiency (WUE) and stomatal limit (Ls) decreased significantly compared with the well-watered control, and there were significant differences in Pn, Gs, Tr and Ls. Observed reductions of Pn were mainly due to reductions in stomatal conductance, indicating that apart from stomatal closure, the photosynthetic apparatus was also partly inhibited.
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Proceedings
2018 8th International Conference on Management, Education and Information (MEICI 2018)
Part of series
Advances in Intelligent Systems Research
Publication Date
December 2018
ISBN
978-94-6252-640-2
ISSN
1951-6851
DOI
https://doi.org/10.2991/meici-18.2018.113How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - Yanyuan Lu
AU  - Li Pan
PY  - 2018/12
DA  - 2018/12
TI  - Response of Gas Exchange to Soil Drought in Old P. kangdingensis Cuttings of Section Tacamahaca Spach
BT  - 2018 8th International Conference on Management, Education and Information (MEICI 2018)
PB  - Atlantis Press
SN  - 1951-6851
UR  - https://doi.org/10.2991/meici-18.2018.113
DO  - https://doi.org/10.2991/meici-18.2018.113
ID  - Lu2018/12
ER  -