the sensitivity of grain sorghum (sorghum bicolor l.) developmental stages to salinity stress: an integrated approach
Authors
abstract
to understand the effects of salinity stress on four different growth stages of sorghum, a greenhouse experiment with 10 treatments, considering all possible combinations of salinity stress and salt- free periods was carried out. the four growth stages for stress application included: emergence until growing point differentiation, growing point differentiation until half bloom, half bloom until soft dough, and soft dough until physiological maturity. treatments were arranged based on randomized complete block design with 3 replications at the research greenhouse of theferdowsiuniversityofmashhadin 2010-2011. salinity stress during early growth and panicle differentiation declined the plant height and tiller number. the highest biological yield was obtained from the control treatment, but it was the lowest when plants were salinized throughout the growing season. when plants were stress-free at 2-3 early stages and then subjected to salt stress, reductions in total dry matter were remarkably less than those experienced when salinity was imposed in later growth stages, especially if salinity occurred at a late individual stage. continuation of salt stress from emergence to both blooming and soft dough stages led to remarkably adverse effects on grain yield. the effect of salinity appears to be most effective on yield components that are growing or developing at the time the salt stress is imposed. the critical period of salinity stress for biological yield was more distinct than that of the grain yield. this indicates that sorghum is not sensitive to salinity at seed setting and seed filling periods.
similar resources
Evaluation of grain sorghum (Sorghum bicolor L.) lines/cultivars under salinity stress using tolerance indices
Selecting and cultivating the crops/varieties that can tolerate water salinity is potentially animportant strategy to save fresh water resources and maximize the crop yield in salt affected areas.To evaluate the responses of 36 sorghum lines and cultivars to salinity stress, two fieldexperiments were conducted in non-stress (EC=2 dS/m) and salinity stress conditions (EC=12dS/m) using randomized...
full textGenetic engineering of grain sorghum (Sorghum bicolor (L
PhD thesis Sorghum (Sorghum bicolor L. Moench), the fifth most important cereal crop in the world, is one of the most important staple crops in Africa and South Asia and represents the only viable food grain for many of the world’s most food insecure people. However, sorghum grain shares the typical nutritional deficiencies of cereal grains, a low content of several essential amino acids. There...
full textMolecular mapping of QTLs conferring stay-green in grain sorghum (Sorghum bicolor L. Moench).
Drought resistance is of enormous importance in crop production. The identification of genetic factors involved in plant response to drought stress provides a strong foundation for improving drought tolerance. Stay-green is a drought resistance trait in sorghum (Sorghum bicolor L. Moench) that gives plants resistance to premature senescence under severe soil moisture stress during the post-flow...
full textModulation of kernel storage proteins in grain sorghum (<i>Sorghum bicolor</i> (L.) Moench)
full text
Modulation of kernel storage proteins in grain sorghum (Sorghum bicolor (L.) Moench).
Sorghum prolamins, termed kafirins, are categorized into subgroups α, β, and γ. The kafirins are co-translationally translocated to the endoplasmic reticulum (ER) where they are assembled into discrete protein bodies that tend to be poorly digestible with low functionality in food and feed applications. As a means to address the issues surrounding functionality and digestibility in sorghum, we ...
full textInheritance of Resistance to Sorghum Shoot Fly, Atherigona soccata in Sorghum, Sorghum bicolor (L.) Moench
Sorghum production is affected by a wide array of biotic constraints, of which sorghum shoot fly, Atherigona soccata is the most important pest, which severely damages the sorghum crop during the seedling stage. Host plant resistance is one of the major components to control sorghum shoot fly, A. soccata. To understand the nature of gene action for inheritance of shoot fly resistance, we evalua...
full textMy Resources
Save resource for easier access later
Journal title:
journal of agricultural science and technologyPublisher: tarbiat modares university
ISSN 1680-7073
volume 15
issue 4 2013
Hosted on Doprax cloud platform doprax.com
copyright © 2015-2023