More To Drought Than Meets The Eye

Looking at Different Ways To Diagnose Drought

Albuquerque, N.M. -- Just as you can't judge a book by its cover, you probably can't judge a tree's drought tolerance by its leaf response, according to Penn State researchers.

"It appears that leaf physiology is not the only way to look at the drought tolerance of trees," says Dr. Marc Abrams, professor of forest ecology in the College of Agricultural Sciences.

Conventional measures of drought tolerance in trees include adaptations deemed necessary to conserve or withstand an absence of water, including deep roots and thick leaves that can continue to photosynthesize -- convert sunlight into usable energy. Drought intolerant species tend to have shallow roots and shut down during drought. It is not unusual for drought-intolerant species to drop their leaves in time of drought and stop photosynthesizing.

The researchers decided to look at another measure of a tree's drought response, the amount of energy put into trunk growth.

"It appears that the drought tolerance ranking of trees in Central Pennsylvania based on ecological distribution or leaf physiology during drought is not an indication of a tree's growth response during drought," the researchers told attendees at the Ecological Society of American Conference, today (Aug. 14) in Albuquerque. "When we looked at the tree rings for drought years, some trees that are considered intolerant to drought, had average or above average growth."

The researchers, who include Abrams; Charles M. Ruffner, graduate student in forest resources; and T. A. Morgan, undergraduate in forestry resources, looked at trees growing in four different areas in the ridge and valley province of Pennsylvania -- ridge, valley, barren and riparian.

The ridge tops were the driest areas and the riparian areas near rivers and streams were the wettest. The valley makes up a moist intermediate soil climate and the barrens are

Contact: A'ndrea Elyse Messer
Penn State

Page: 1 2 3

Related biology news :

1. Droughts like 1930s Dust Bowl may have been unexceptional in prehistoric times, new study suggests
2. Drought
3. Droughts worse than the 1930s likely in the 21st century
4. Drought brings environmental, ecological changes
5. Drought worsens, spreads
6. Jet Stream Studied In West African Drought
7. New Evidence For Corns Ancestry Could Lead To Insect And Drought Resistant Crops
8. Transgenic Rice Plants Resist Insects, Drought And Salt Damage
9. The Presidents Coral Reef Task Force Meets On March 5-6
10. NSB Meets In L.A. On Expanded Environmental Research, Education, Assessment
11. Where The Rubber Meets The Air

Post Your Comments:

(Date:2/22/2019)... , ... February 21, 2019 , ... Clean label food ... expected when creating natural foods and beverages. It is quite common to spot consumers ... Yet, meat products are not immune to this label scrutiny. , More than ...
(Date:2/19/2019)... ... February 20, 2019 , ... ... that will see Dimensions rolled out across the organization. Dimensions provides in-depth ... across their business, support strategic planning, and understand past and future funding ...
(Date:2/14/2019)... ... February 14, 2019 , ... This year’s conference in ... 80 scientific sessions and 2,100 presentations. Given SOT’s mission to bring together researchers ... OpenLiver™ 3D cell culture model initiative that it recently launched with Biopredic ...
Breaking Biology News(10 mins):
(Date:2/2/2019)... ... ... Stay on top of current hot topics through free webinars presented by leading ... free, so be sure to register today to save your place! Participate in the ... our upcoming webinars, or click below to learn more about each webinar: , CLINICAL ...
(Date:1/30/2019)... ... January 29, 2019 , ... Could a computer detect a ... tricky math problem on an online tutoring program? Could it detect deep reflection ... science assistant professor Erin Solovey is working to develop a system ...
(Date:1/24/2019)... ... ... Controlled Contamination Services is pleased to announce three exciting new additions to ... team members will support its growing operation across the US and will be a ... This addition will enable CCS to widen its reach and provide enterprise wide solutions ...
(Date:1/20/2019)... ... January 16, 2019 , ... On January 15 of ... news article by Asymmetrex director James L. Sherley, M.D., Ph.D. The ... resources like the PGCB and CellTrials.org. Now in its 21st year of operation, ...
Breaking Biology Technology:
Cached News: