Navigation Links
To wilt or not to wilt
Date:5/14/2014

stomata wide open and have trouble readjusting to their new conditions. This results in dehydration hence the limp leaves and wilted flowers.

The early growth conditions notably relative humidity play an important role in this regard. Recent studies have shown that there is a wide genetic variation in the extent to which this phenomenon occurs. Some plants are just better at switching to dry conditions than others after a prolonged period with high humidity.

Habtamu Giday wondered what the underlying mechanism is that rules whether stomata open or close.

Rubber leaf imprints

To get a closer look at the how the stomata work under various humidity conditions, he used leaves from potted roses, a tube of silicon rubber and a dab of nail polish.

The rose plants were raised under controlled climatic conditions at high and medium relative humidity after which they were exposed to drought conditions. Habtamu Giday took leaf samples from these plants and squeezed a small portion of rubber silicone on the leaves to make a detailed imprint of the leaves and their stomata. He then painted the silicone rubber imprints with a fine layer of clear nail polish to achieve a thin, transparent layer that he could peel off and study under the microscope.

Using this method he could gain insight into which conditions stimulated the stomata to open and close. Habtamu Giday found that the roses grown under high humidity conditions had a higher level of abscisic acid and that the high level of this particular growth hormone persisted even when the plants were subjected to drought conditions.

- Stomatal responsiveness seems to be determined by the long-term level of abscisic acid which, in turn, is affected by the relative humidity during the early growth stages, says Habtamu Giday.

Improving stomatal responsiveness

The next question that came to mind was if it possible to take advantage of the
'/>"/>

Contact: Habtamu Giday Gebraegziabher
habtamu.giday@agrsci.dk
Aarhus University
Source:Eurekalert  

Page: 1 2 3

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
To wilt or not to wilt
(Date:1/22/2015)... 2015  Today, FreeWavz ( www.FreeWavz.com ), the developer ... on Fundable, https://www.fundable.com/freewavz . FreeWavz will be ... to meet customer demand. Logo - ... Invented by Dr. ...
(Date:1/22/2015)... Conn. , Jan. 20, 2015 NXT-ID, Inc. (NASDAQ: ... mobile commerce market, reports on the recent success of the Wocket™ smart ... Wocket smart wallet was named as one of the "11 ... the "5 Best Products Launched At CES So Far" by Newseveryday.com and ...
(Date:1/22/2015)... and Markets ( http://www.researchandmarkets.com/research/wxdglm/global_wearable ) has ... Technologies Market and Applications, Opportunities, Industry Analysis, Segmentation, ... report to their offering. , ... be worn on the user,s body and have ...
Breaking Biology News(10 mins):FreeWavz Launches on Fundable to Drive Speed-to-Market in 2015 2CES Response for NXT-ID's Wocket Smart Wallet Kicks Off 2015 2CES Response for NXT-ID's Wocket Smart Wallet Kicks Off 2015 3Global Wearable Technologies Market and Applications, Opportunities, Industry Analysis, Segmentation, Size, Growth, Share, Overview, Trends and Forecast 2014-2020 2
... gets older, people live longer. The price we pay: ... all organs, the immune system does not function flawlessly ... non-university research institutes and two companies is investigating why ... old. The project "GERONTOSHIELD", funded by the German Federal ...
... Researchers with the International Agency for Research on Cancer ... significantly more likely to have several high-risk forms of ... not have lung cancer. These results, which were presented ... 2-6, indicate that HPV antibodies are substantially increased in ...
... particles only billionths of a meter in diameterabout two thousand would ... in a small package to the many millions of people who ... and cell phones, say scientists at Brigham and Women,s Hospital (BWH). ... the team will report a new approach to preventing the ...
Cached Biology News:A better understanding of the aging immune system 2Lung cancer risk rises in the presence of HPV antibodies 2Nanoparticles offer hope for common skin allergy 2Nanoparticles offer hope for common skin allergy 3
(Date:12/24/2014)... Dec. 24, 2014  United Therapeutics Corporation (NASDAQ: ... MDT ) has submitted a pre-market approval application ... the use of Medtronic,s SynchroMed ® II implantable ... use with United Therapeutics, Remodulin ® (treprostinil) Injection ...
(Date:12/24/2014)... 24, 2014   BioLife Solutions , Inc. (NASDAQ: ... clinical grade hypothermic storage and cryopreservation freeze ... cells and tissues  ("BioLife" or the "Company"), today announced that ... May 4, 2015 (the "Annual Meeting"). Because the ...
(Date:12/24/2014)... Earlier this year in a June 24 international ... Stem Cell Technology Center, LLC ( ASCTC ) focused attention ... adult tissue stem cells. His title “Asymmetric Self-Renewal by ... Future,” embodied the essence of his message to congress participants. ...
(Date:12/24/2014)... 23, 2014 According to Ross Selinger, President ... of ITRA Global, the national office market continues to be ... This is evidenced by the third quarter’s surprising 3.9% GDP, ... Low energy costs have held inflation down and the Fed ...
Breaking Biology Technology:United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 2United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 3United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 4BioLife Solutions Sets Date for Annual Meeting of Stockholders 2Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 2Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 3Adult Stem Cell Technology Center, LLC’s Director Sherley's Address on What’s Holding Back Regenerative Medicine Featured on Omics Group Website 4ITRA Global Reports Long Island Is Out of Sync With The National Office Market 2ITRA Global Reports Long Island Is Out of Sync With The National Office Market 3
... Sinovac Biotech Ltd. (Amex:,SVA), a leading provider of ... Health has purchased approximately RMB 20 million (US$2.86,million) ... to,vaccinate people living in the disaster zone following ... the Healive vaccine to,Sichuan, Shanxi and Gansu provinces., ...
... (NYSE: SGP ) today announced that ... investor relations, effective immediately., In this ... implementing,and continually improving a comprehensive global investor ... formulation and execution of,external and internal investor ...
... American Stock Exchange(R),(Amex(R)) today listed the common ... symbol RNN., Rexahn Pharmaceuticals is a ... discover, develop and commercialize,innovative treatments for cancer, ... unmet medical needs. Rexahn,s compounds are designed,to ...
Cached Biology Technology:Sinovac Receives RMB 20 Million Purchase Order for Healive from China's Ministry of Health to Vaccinate Earthquake Victims 2Schering-Plough Appoints Janet M. Barth Vice President, Investor Relations 2American Stock Exchange Lists the Common Stock of Rexahn Pharmaceuticals, Inc. 2
... Select Tissue Arrays are intended for laboratory ... were fixed in neutral buffered formalin and ... diagnosis was performed by certified pathologists. ... blocks and relocated into a new recipient ...
The Odyssey Infrared Imaging System is a complete family of products that includes the Odyssey Imager, IRDye labeling reagents and Odyssey software for scan control and data analysis....
... CAST Equine EIA Principle: ... LTC4, LTD4 and LTE4 are ... by 5-lipoxygenase and glutathione-S-transferase. In ... termed "Slow Reacting Substances of ...
... Compound(s) tested through 63 ... assays spanning a broad ... panel includes many non ... several non-selective assays. ...
Biology Products: