Navigation Links
How did cactuses evolve?

In a groundbreaking new study in the June issue of American Naturalist, Erika J. Edwards (Yale University and University of California, Santa Barbara) and Michael J. Donoghue (Yale University) explore how leafy, "normal" plants evolved into the leafless succulent cactus.

"The cactus form is often heralded as a striking example of the tight relationship between form and function in plants," write the authors. "A succulent, long-lived photosynthetic system allows cacti to survive periods of extreme drought while maintaining well-hydrated tissues."

Recent molecular phylogenetic work has confirmed that Pereskia, a genus that consists of 17 species of leafy shrubs and trees, is where the earliest cactus lineages began. Using field studies and environmental modeling, Edwards and Donoghue found that the Pereskia species already showed water use patterns that are similar to the leafless, stem-succulent cacti.

"[Our] analyses suggest that several key elements of cactus ecological function were established prior to the evolution of the cactus life form," explain the authors. "Such a sequence may be common in evolution, but it has rarely been documented as few studies have incorporated physiological, ecological, anatomical, and phylogenetic data."


'"/>

Source:University of Chicago Press Journals


Page: 1

Related biology news :

1. Growth hormone is made in the brain, report scientists
2. Electronic chip, interacting with the brain, modifies pathways for controlling movement
3. Seals protect brain, conserve oxygen by turning off shivering response on icy dives
4. Neuronal traffic jam marks early Alzheimers disease
5. Discovery of T-cell traffic control boosts new drug promise
6. Cells direct membrane traffic by channel width
7. Bugs expose underground carbon traffic system 10 times more important than fossil fuel burning
8. Molecular mechanism provides intra-cellular traffic signal
9. Cellular traffic backups implicated in skeletal malformations
10. New imaging technique tracks traffic patterns of white blood cells
11. A traffic light for neurons means go for improving brain research
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/31/2017)... 31, 2017  Spero Therapeutics, LLC, a biopharmaceutical ... treatment of bacterial infections, today announced it has ... from Pro Bono Bio Ltd (PBB) to bolster ... resistant forms of Gram-negative bacteria.   The assets acquired ... a PBB group company. "The acquisition ...
(Date:1/26/2017)... , Jan. 26, 2017  Crossmatch, a leading provider ... new solution aimed at combatting fraud, waste and abuse ... introduced at the Action on Disaster Relief conference in ... point for UN agencies and foreign assistance organizations throughout ... waste and abuse are a largely unacknowledged problem in ...
(Date:1/25/2017)... 25, 2017 The Elements of Enterprise Information ... is comprised of a comprehensive set of business ... maintaining digital identities and providing a secured and ... are significant number of programs opted by enterprises ... by optimizing processes and changing policies. However, there ...
Breaking Biology News(10 mins):
(Date:2/17/2017)... Feb. 17, 2017  BioGenex, a global leader ... of a novel system for quantitative immunohistochemistry (IHC). ... University of Rochester (NY, USA) and Konica-Minolta Inc. ... system is able to accurately quantify the expression ... epidermal growth factor receptor-2) in clinical samples. Quantitative ...
(Date:2/16/2017)... ... 2017 , ... Avomeen & MichBio will be hosting a BioMixer next week ... Analytical Services (4840 Venture Dr., Ann Arbor, Michigan 48108). BioMixers are a casual, ... interact with peers, make new connections and talk bio biz. , Cost:, ...
(Date:2/16/2017)... , Feb. 16, 2017 Research ... "Synthetic Biology: Global Markets" report to their offering. ... ... (synthetic genes, biobrick parts, delivery plasmids, chassis organisms, synthetic ... and assembly, genome editing, bioinformatics and specialty media) and ...
(Date:2/16/2017)... DIEGO , Feb. 16, 2017  Dermata ... innovative products to treat a variety of dermatological ... million Series 1a financing and entered into a ... (SVB).  Dermata intends to use the capital for ... making major advancements in the treatment of serious ...
Breaking Biology Technology: