Featured Research

from universities, journals, and other organizations

'Living stone' plant adapts to extreme conditions in new ways

Date:
October 23, 2013
Source:
Public Library of Science
Summary:
A unique plant that lives underground uses multiple mechanisms to boost photosynthesis and offers new insights into how plants adapt to extreme conditions.

This image depicts the longitudinal leaf transect showing epidermis under UV light.
Credit: Matthew P. Davey

A unique plant that lives underground uses multiple mechanisms to boost photosynthesis and offers new insights into how plants adapt to extreme conditions, according to new research published October 23 in the open-access journal PLOS ONE, by Katie Field and colleagues at the University of Sheffield and other institutions.

Lithops are a type of South African "living stone," a mostly underground plant that lives in extremely dry conditions. This underground life makes it difficult to get enough sun to photosynthesize while still conserving as much water as possible. Lithops has many adaptations to help it do just this, including a top surface with "windows" of translucent pockets that allows light penetration to photosynthetic tissues deep within the subterranean leaf. Cleverly, these windows also have sunscreen properties to block out harmful UV light.

But too much light can also be a problem, resulting in excess energy that cannot be used effectively for photosynthesis. To offset this excess energy and protect themselves against damage, plants with above-ground photosynthetic organs use a process known as non-photochemical quenching (NPQ).

The authors here use a combination of techniques to show that individual leaves of a Lithops species have adaptations for both high light and shade tolerance, revealing for the first time the physiological mechanisms employed to optimize above-ground and subterranean photosynthesis while minimizing water loss within its extremely dry environment. Specifically, they found local differences in surface adaptations (windows) combined with regional physiological differences in the outer cell shape and chemistry and photosynthetic mechanisms, which are dependent on whether the leaf is deep underground or just above ground. This is the first time such physiological flexibility has been observed in Lithops, and offers new insight into how plants respond and adapt to extreme conditions.


Story Source:

The above story is based on materials provided by Public Library of Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Katie J. Field, Rachel George, Brian Fearn, W. Paul Quick, Matthew P. Davey. Best of Both Worlds: Simultaneous High-Light and Shade-Tolerance Adaptations within Individual Leaves of the Living Stone Lithops aucampiae. PLoS ONE, 2013; 8 (10): e75671 DOI: 10.1371/journal.pone.0075671

Cite This Page:

Public Library of Science. "'Living stone' plant adapts to extreme conditions in new ways." ScienceDaily. ScienceDaily, 23 October 2013. <www.sciencedaily.com/releases/2013/10/131023183256.htm>.
Public Library of Science. (2013, October 23). 'Living stone' plant adapts to extreme conditions in new ways. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2013/10/131023183256.htm
Public Library of Science. "'Living stone' plant adapts to extreme conditions in new ways." ScienceDaily. www.sciencedaily.com/releases/2013/10/131023183256.htm (accessed October 21, 2014).

Share This



More Plants & Animals News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

'Cadaver Dog' Sniffs out Human Remains

'Cadaver Dog' Sniffs out Human Remains

AP (Oct. 21, 2014) Where's a body buried? Buster's nose can often tell you. He's a cadaver dog, specially trained to find human remains and increasingly being used by law enforcement and accepted in courts. These dogs are helping solve even decades-old mysteries. (Oct. 21) Video provided by AP
Powered by NewsLook.com
White Lion Cubs Born in Belgrade Zoo

White Lion Cubs Born in Belgrade Zoo

AFP (Oct. 20, 2014) Two white lion cubs, an extremely rare subspecies of the African lion, were recently born at Belgrade Zoo. They are being bottle fed by zoo keepers after they were rejected by their mother after birth. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com
Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com
Goliath Spider Will Give You Nightmares

Goliath Spider Will Give You Nightmares

Buzz60 (Oct. 20, 2014) An entomologist stumbled upon a South American Goliath Birdeater. With a name like that, you know it's a terrifying creepy crawler. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins