The paper presents the findings of the research on salt and wilt tolerance in various ecological and geographical germplasms of cotton. In accordance with the resistance levels, the germplasm lines were split into several classes based on the performance. Resistant and unstable genotypes were present in all the ecological-geographical groups analysed, but the frequency of distribution was different. A range of G, as a result of environmental studies. The L hirsutum. Genotypes have been established that show promise for selection in different ecological-geographical groups. In order to research the degree of resistance to wilt and salt tolerance in 400 cotton genotypes and highly resistant wilt genotypes, three varieties from Uzbekistan (A-1431, A-1530 and A-3941), one variety from China (A-3761), one genotype from Pakistan (A-3684) and three varieties from India, a screening was carried out (A-3657, A-3401 and A-3400). Cotton genotypes and highly resistant salt tolerance genotypes; six Uzbek varieties (A-36, A-492, A-740, A-775 A-807, A-501), two Indian varieties (A-2059 and A-2321), one Armenian genotype (A-385), one Ukrainian genotype (A-2154) and three Azerbaijani genotypes (A-1892, A-564 and A-2219), which can be used as donors to pick wilt and salt resistant cotton varieties.
Please see the link :- https://www.ikprress.org/index.php/PCBMB/article/view/5467Saturday, January 30, 2021
Monday, November 16, 2020
HEAT SHOCK PROTEINS (HSPs) - A MOLECULAR CHAPERONE FOR PLANT PROTECTION | PLANT CELL BIOTECHNOLOGY AND MOLECULAR BIOLOGY
Heat shock proteins (HSPs) are the molecular chaperones that perform cellular responses to stress, maintain cell homeostasis and are responsible for folding of unfolded or denatured proteins caused during the stress. Plants are exposed to various stress factors such as drought, salinity, extreme high/low temperature and UV radiation. These factors cause damage to the plants and plant HSPs play an important role in combating environmental and pathogenic stresses. It also improves the stability of the membrane and scavenges the reactive oxygen species by activating scavenging enzymes. According to their molecular weight and based on their location, HSP is categorized into different subfamilies. Their function and role are discussed in the current review.
Please see the link :- https://www.ikprress.org/index.php/PCBMB/article/view/5217
METAL STRESS ON SEED GERMINATION AND GROWTH | PLANT CELL BIOTECHNOLOGY AND MOLECULAR BIOLOGY
Heavy metals are non-biodegradable which form the major group of environmental pollutants and can harm humans and other living organisms via food chains, often leading to toxicosis, thus are bringing attention towards themselves for studies and research. The heavy metals which can cause toxic effects to plants; leading to less productivity and effecting the agro-ecosystem; include lead, cadmium, copper, cobalt, nickel etc. The metal toxicity in plants manifest through an array of physiological and metabolic alterations which may include alteration in key enzyme activities, protein mobilization, photosynthesis and synthesis of metal detoxifying compounds due to induction of oxidative stress. There is an increase in the generation of reactive oxygen species on accumulation of metal ions in plant tissues which can be decreased with the help of antioxidants due to its ability to trap free radicals. Also in some plants metals as trace elements are essential for normal metabolic function but are toxic in higher concentrations thereby are hampering the physiological and metabolic functions of plants. Further, it has been observed that due to metal stress some plants produce heat shock proteins and which can affect the photosynthesis by destabilizing enzymes. This review is summarized to understand the effect of metal stress on seed germination and growth.
Please see the link :- https://www.ikprress.org/index.php/PCBMB/article/view/5216