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:4/13/2016)... CHICAGO , April 13, 2016  IMPOWER physicians ... are setting a new clinical standard in telehealth ... By leveraging the higi platform, IMPOWER patients can ... weight, pulse and body mass index, and, when they ... quick and convenient visit to a local retail location ...
(Date:3/22/2016)... 2016 According to ... for Consumer Industry by Type (Image, Motion, Pressure, ... & IT, Entertainment, Home Appliances, & Wearable ... 2022", published by MarketsandMarkets, the market for ... USD 26.76 Billion by 2022, at a ...
(Date:3/15/2016)... 15, 2016 --> ... Transparency Market Research "Digital Door Lock Systems Market - Global ... 2023," the global digital door lock systems market in terms ... and is forecast to grow at a CAGR of 31.8% ... and medium enterprises (MSMEs) across the world and high industrial ...
Breaking Biology News(10 mins):
(Date:4/27/2016)... ... April 27, 2016 , ... Cambridge Semantics, the ... technology, today announced that it has been named to The Silicon Review’s “20 Fastest ... and other markets, Cambridge Semantics serves the needs of end users facing some of ...
(Date:4/27/2016)... and RESEARCH TRIANGLE PARK, N.C. , ... UTHR ) announced today that Martine Rothblatt ... Therapeutics will provide an overview and update on the ... Annual Health Care Conference. The presentation will ... a.m. Eastern Time, and can be accessed via a ...
(Date:4/27/2016)... ... April 27, 2016 , ... Global Stem Cells Group CEO ... is the founder of GSCG affiliate Kimera Labs in Miami. , In 2004, Ross ... stem cell transplantation for hematologic disorders and the suppression of graft vs. host disease ...
(Date:4/26/2016)... (PRWEB) , ... April 26, 2016 , ... ... today announced that Ardy Arianpour has joined the company as Chief Business Officer. ... experience bringing innovative genomic technologies to market, was most recently Chief Commercial Officer ...
Breaking Biology Technology: