3.9 C
Tuesday, April 7, 2020
Home Journals Annals of Botany Embolism resistance and dehydration tolerance in a perennial grass

Embolism resistance and dehydration tolerance in a perennial grass

More intense droughts under climate change threaten species resilience. Hydraulic strategies determine drought survival in woody species but are hardly explored in herbaceous species. Volaire et al. investigated the intraspecific variability of hydraulic and morphological traits as indicators of dehydration tolerance in a perennial grass, cocksfoot (Dactylis glomerata), which has a large biogeographical distribution in Europe.

Dactylis glomerata or Cock's foot
Dactylis glomerata. Image Volaire et al.

The authors grew twelve populations of cocksfoot originating from Mediterranean, Temperate and Northern European areas in a controlled environment in pots. They measured dehydration tolerance, leaf and stem anatomical traits and xylem pressure associated with 88 or 50 % loss of xylem conductance (P88, P50). They found embolism resistance correlated with the precipitations of the origin sites of the populations, dehydration tolerance, leaf mechanical resistance and the thickness of metaxylem vessel walls in stems.

Compared with woody species, the large intraspecific variability in dehydration tolerance and embolism resistance within cocksfoot has consequences for its sensitivity to climate change. To better understand adaptive strategies of herbaceous species to increasing drought and frost requires further exploration of the role of hydraulic and mechanical traits using a larger inter- and intraspecific range of species.

Annals of Botany Officehttp://aob.oxfordjournals.com
The Annals of Botany Office is based at the University of Oxford.

Latest Articles

Most Popular

10 Plants Used to Spice up Sex

It's well-known that plants can affect how the brain works. Take the right plant in the right dose and you can have an altered...

Will Martian cuisine have a terrifying surprise?

Mars One has launched a project to put humans on Mars by cutting out one of the biggest costs of the mission. Putting a...

The Garden Jungle by Dave Goulson

(or Gardening to Save the Planet) On my every growing to-do list is create...

What a Plant Knows by Daniel Chamovitz

If you're looking to show doubters that plants are fascinating then a good starting point is Daniel Chamovitz's What a Plant Knows. I was...

Recent Comments