Response of Gas Exchange to Soil Drought in Old P. kangdingensis Cuttings of Section Tacamahaca Spach
- 10.2991/meici-18.2018.113How to use a DOI?
- P. kangdingensis; Old tree; Drought resistance; Gas exchange
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.
- © 2018, 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/).
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 - Proceedings of the 2018 8th International Conference on Management, Education and Information (MEICI 2018) PB - Atlantis Press SP - 573 EP - 577 SN - 1951-6851 UR - https://doi.org/10.2991/meici-18.2018.113 DO - 10.2991/meici-18.2018.113 ID - Lu2018/12 ER -