Predicting climatic limits along a rainfall gradient of dipterocarp species based on leaf turgor loss point

Drought tolerance is an integral determinant of drought survival in trees; thus, an accurate and rapid assessment of drought tolerance can lead to improved prediction of forest responses to droughts. The osmometer method enables the rapid determination of the leaf water potential at turgor loss (πtlp), a key parameter of drought tolerance, from the osmotic potential at full turgor (πsat). However, despite its wide applications, there have been few validations in ever-wet tropical rainforests. Here, we assessed the efficacy of the osmometer method in dipterocarps, a dominant tree group in SE Asia in ever-wet Malaysia, and examined the linkage between πtlp and distribution along a rainfall gradient. The πtlp determined using conventional method was strongly and linearly correlated with the πsat determined using an osmometer. The coefficients of our model were statistically identical to those previously represented, but with a slightly larger intercept (0.21 MPa). Species with more negativ..., , # Data from: Predicting climatic limits along a rainfall gradient of dipterocarp species based on leaf turgor loss point

Dataset DOI: [10.5061/dryad.9s4mw6mtc](10.5061/dryad.9s4mw6mtc)

## Description of the data and file structure

This dataset represents complete data used in this paper.

### Files and variables

#### Files:

#### ・230325data\_Kawai\_et\_al\_Biotropica\_πsat\_osm.csv

#### ・080425data\_Kawai\_et\_al\_Biotropica\_P-Vcurve\_and\_other\_traits\_rev.csv

#### ・230325data\_Kawai\_et\_al\_Biotropica\_Species\_distribution.csv

**Description:** 

\"n/a\" indicates no data. 

##### Variables

* Species: name of species 
* Individual: identity of individual within species 
* Leaf: identity of leaf within individual
* πsat_osm: osmotic potential at full turgor estimated from an osmometer. Unit in MPa.
* πsat: osmotic potential at full turgor estimated from a pressure-volume curve. Unit in MPa.
* πtlp: leaf water potential at turgor loss. Unit in MPa.
* RWCtlp: relative water c...,