Navigation Links
Salt-tolerant crops show higher capacity for carbon fixation
Date:12/12/2011

MURCIA, SPAINSalt can have drastic effects on the growth and yield of horticultural crops; studies have estimated that salinity renders an about one-third of the world's irrigated land unsuitable for crop production. Imbalances in soil salinity can cause ion toxicity, osmotic stress, mineral deficiencies, and drastic physiological and biochemical changes in plants. Salt stress can even cause plants to adjust their water usageto conserve water, some plants close their stomata, thus restricting the entry of carbon dioxide (CO2) into the leaf and reducing photosynthesis.

One solution to salinity issues has been to boost the salt tolerance of conventional crops and plants, but resulting gain in crop yield has traditionally been low. To better understand the behavior of salt-tolerant and -sensitive plants in challenging situations, scientists performed a comparative study of carbon fixation by different plant species under conditions of salinity. Tomato, lettuce, pepper, melon, and watermelon were tested in a greenhouse in southeast Spain. The net photosynthetic rate, gS, and transpiration rate of the plants were measured at atmospheric CO2 during the daytime and were related to the total chlorophyll, carbon, and mineral contents of each species.

According to the research study (HortScience), melon or pepper crops showed significantly lower photosynthetic rates when they were grown in saline conditions. The total chlorophyll content and carbon percentage were also lower in the salinity-treated plants of melon and pepper. Treated lettuce plants showed a significant decrease in photosynthetic rates and chlorophyll content, but there were no differences in carbon content. "On the other hand, there were no significant differences in the values of total chlorophyll content, photosynthetic rate, or carbon content for tomato and watermelon plants when control and salt-treated plants were compared", the report said. The mineral composition data showed greater increases of sodium in both roots and leaves of melon and pepper when plants were treated with NaCl compared with the rest of the species.

"Almost all of the results obtained showed that lettuce, pepper, and melon are less adapted to saline conditions and that these crops seem to be less efficient in CO2 fixation and, therefore, have less capacity for carbon accumulation", noted corresponding author Micaela Carvajal. "We concluded that the species more tolerant of saline conditions (tomato and watermelon) showed a higher capacity for fixation of atmospheric CO2 than the sensitive species (lettuce, melon, and pepper). These results seem to be related to the capacity of each species to maintain the photosynthetic processes and gS in stressing situations."


'/>"/>

Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert

Related biology news :

1. CSIRO develops highest-yielding salt-tolerant wheat
2. Scientists closer to developing salt-tolerant crops
3. Feasibility of using mycoherbicides to control illicit drug crops is uncertain
4. Genome-scale network of rice genes to speed the development of biofuel crops
5. Breakthrough in the production of flood-tolerant crops
6. Smarter toxins help crops fight resistant pests
7. Do long-lived crops differ from annual crops in their genetic response to human domestication?
8. $40 million project to revitalize Africas orphaned crops announced
9. Manipulating plants circadian clock may make all-season crops possible
10. Testing the water for bioenergy crops
11. New genome sequence could improve important agricultural crops
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/28/2016)... India , April 28, 2016 ... Infosys (NYSE: INFY ), and Samsung SDS, a ... that will provide end customers with a more secure, ... services.      (Logo: http://photos.prnewswire.com/prnh/20130122/589162 ) , ... services, but it also plays a fundamental part in enabling ...
(Date:4/15/2016)... 2016  A new partnership announced today will ... decisions in a fraction of the time it ... high-value life insurance policies to consumers without requiring ... Force Diagnostics, rapid testing (A1C, Cotinine and HIV) ... pressure, weight, pulse, BMI, and activity data) available ...
(Date:3/31/2016)... PROVIDENCE, R.I. , March 31, 2016  Genomics ... leadership of founding CEO, Barrett Bready , M.D., ... addition, members of the original technical leadership team, including ... Vice President of Product Development, Steve Nurnberg and Vice ... have returned to the company. Dr. Bready ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... ... May 25, 2016 , ... WEDI, the nation’s leading authority on the ... Charles W. Stellar has been named by the WEDI Board of Directors as WEDI’s ... an executive leader with more than 35 years of experience in healthcare, association management ...
(Date:5/24/2016)... La Jolla, CA (PRWEB) , ... May 24, 2016 , ... ... and financial planning for corporate executives and entrepreneurs, held The Future of San Diego ... leaders in the San Diego life science community attended the event with speakers Dr. ...
(Date:5/23/2016)... 23, 2016 Oxitec CEO Hadyn ... at 10:15 a.m. ET before the United States House Committee ... mosquitos can play in controlling the spread of the ... virus.      (Logo: http://photos.prnewswire.com/prnh/20150630/227348 ) ... a self-limiting gene. Trials in Brazil , ...
(Date:5/20/2016)... Diego, CA (PRWEB) , ... May 20, 2016 , ... ... that 10 of its most experienced veterinary clients have treated over 100 of their ... cutting edge technology to provide the highest level of care for their patients. ...
Breaking Biology Technology: