数据资源: 林业前沿资讯

Alternative methods of estimating the water potential at turgor loss point in Acer genotypes

编号 040018903

推送时间 20190603

研究领域 森林培育 

年份 2019 

类型 期刊 

语种 英语

标题 Alternative methods of estimating the water potential at turgor loss point in Acer genotypes

第189期

发表时间 20190404

摘要 Background
Selecting for drought tolerance in urban tree species can have a significant influence on survival rates, aftercare requirements and performance. The water potential at turgor loss point (πtlp) is gaining popularity as a trait to help determine drought tolerance to aid tree selection. Therefore, it is important to understand if differing methods used to measure or calculate πtlp deliver consistent results.
Results
The sensitivity of three methods used to determine this valuable selection parameter were evaluated. A classical pressure chamber, pressure–volume (P–V) curve method was compared with vapour-pressure osmometer (Vapro?) and dewpoint hygrometer (WP4C) methods. These methods were evaluated using closely related cultivars of Acer platanoides and A. pseudoplatanus ‘Negenia’.
Conclusion
Both the osmometer and hygrometer methods ranked genotypes with a very high similarity (Rs?=?1, R2?=?0.96) and were able to identify significant differences between cultivars. This is the first study to demonstrate suitability of the dewpoint hygrometer in comparison to the vapour-pressure osmometer to measure πtlp. The P–V method was unable to identify differences between the cultivars tested. The Vapro and WP4C provide greater applicability than the conventional P–V method to studies requiring both high throughput and high sensitivity. Consistency of measurement type is however highly recommended in future studies as some differences were observed between Vapro and WP4C.
link:http://pan.ckcest.cn/rcservice//doc?doc_id=39361

服务人员 孙小满

关键词 Turgor loss point  Drought tolerance  Pressure–volume curve  Hygrometer  Osmometer  Pressure-bomb 

来源期刊 Plant Methods

发表年份 2019

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