Published: 2021-03-15

Page: 18-23


Department of Botany, Khalsa College, Amritsar-143001, Punjab, India.


Department of Botany, Khalsa College, Amritsar-143001, Punjab, India.


Department of Botany, Khalsa College, Amritsar-143001, Punjab, India.

*Author to whom correspondence should be addressed.


The aim of present study was to explore the deteriorating impact of temperature stress on morpho-physiological attributes and photosynthetic pigments of Brassica napus L. seedlings exposed to oxidative stress caused by high (40°C) and low (4°C) temperature. For this, experiments were carried out at the Senior Laboratory, P.G. Department of Botany, Khalsa College, Amritsar. Effect of different degrees of temperature (4°C and 40°C) on double distilled water primed seedlings of B. napus L. was investigated. Different degrees of temperatures used in present study showed diverse effect on shoot, root length and light quenching pigments such as chlorophyll a, chlorophyll b, total chlorophyll and total carotenoids content.  Low temperature (4°C) treatment depreciate all aspects of growth and physiology by diminishing photosynthetic pigments and altering the carbon makeup negatively as compared to control, Although high temperature treatment also deteriorated all the attributes of growth, physiological and biochemical components as compared to control and low temperature treated seedlings. In conclusion both low and high temperature (4°C & 40°C) decrease the amelioration of morphophysiological components, reallocation of nutrients and modulation of photosynthetic machinery.

Keywords: Temperature stress, Brassica napus, photosystem II, morphophysiology, carotenoids.

How to Cite

KAUR, H., SINGH, J., & KAUR, K. (2021). IMPACT OF TEMPERATURE STRESS ON THE FUNCTIONAL EFFICIENCY OF Brassica napus SEEDLINGS. Asian Journal of Plant and Soil Sciences, 5(1), 18–23. Retrieved from


Download data is not yet available.


Janska A, Marsik P, Zelenkova S, Ovesna J. Cold stress and acclimation: what is important for metabolic adjustment. Plant Biology. 2010;12:395-405.

Koornneef M, Hanhart CJ, Van der Veen JH. A genetic and physiological analysis of late flowering mutants in Arabidopsis thaliana. Mol. Gen. Genet. 1991;229:57–66.

Houghton JT, Ding Y, Griggs DJ, Noguer M, Linden PJ, Xiaosu D. Climate change: the scientific basis contribution of working group first to third assessment report of the intergovernmental panel on climate change. Cambridge University Press, UK; 2001.

Blokhina O, Virolainen E, Fagerstedt KV. Antioxidants, oxidative damage and oxygen deprivation stress: a review. Ann Bot. 2003;91:179-194.

Pan J, Lin S, Woodbury NW. Bacteriochlorophyll excited state quenching pathways in bacterial reaction centers with the primary donor oxidized. J. Phys. Chem. B. 2012;116:2014-2022.

Ashraf M, Harris PJC. Photosynthesis under stressful environments: An overview. Photosynthetica. 2013;51:16-190.

Berry J, Bjorkman O. Photosynthetic response and adaptation to temperature in higher plants. Ann Rev Plant Physiol. 1980;31:491-543.

Sharkey TD. Effects of moderate heat stress on photosynthesis: importance of thylakoid reactions, Rubisco deactivation, reactive oxygen species, and thermotolerance provided by isoprene. Plant Cell Environ. 2005;28:269-277.

Wang WX, Vinocur B, Shoseyov O. Altman A biotechnology of plant osmotic stress tolerance: physiological and molecular considerations. Acta Hort. 2001;560:285-292.

Yan K, Chen P, Shao H, Zhang L, Xu G. Effects of short-term high temperature on photosynthesis and photosystem ii performance in sorghum. J Agronomy and Crop Science. 2011;197:400-408.

Eitzinger J, Orlandini S, Stefanski R, Naylor REL. Climate change and agriculture. Introductory editorial. J. Agric. Sci. 2010;148:499–500.

Rodriguez MV, Barrero JM, Corbineau F, Gubler F, Benech-Arnold RL. Dormancy in cereals (not too much, not so little): about the mechanisms behind this trait. Seed Science Research. 2015;25:99-119.

Soengas P, Víctor M, Velasco RP, Cartea ME. Effect of temperature stress on antioxidant defenses in Brassica oleracea. ACS Omega. 2008;3(5):5237-5243.

Zhang J, Jiang F, Yang P, Li J, Yan G, Hu L. Responses of canola (Brassica napus L.) cultivars under contrasting temperature regimes during early seedling growth stage as revealed by multiple physiological criteria. Acta Physiol. Plant. 2015;37:7-10.
DOI: 1007/s11738-014-1748-9.

Lichtenthaler HK. Chlorophylls and carotenoids: pigments of photosynthetic biomembranes (L Packer & R Douce, eds). Methods in Enzymology. Academic Press, New york. 1987;148:350-382.

Singh I, Shono M. Physiological and molecular effects of 24-epibrassinolide, a brassinosteroid on thermotolerance of tomato. Plant Growth Regul. 2005;47:111-119.

Kaur H, Sirhindi G, Bhardwaj R. Influence of 28-homobrassinolide on photochemical efficiency in Brassica juncea under dual stress of extreme temperatures and salt. Canadian Journal of Pure and Applied Sciences. 2017;11(2):4205-4213.

Cavusoglu K, Kabar K. Comparative effects of some plant growth regulators on the germination of barley and radish seeds under high temperature stress. Eur. Asian J. of BioSci. 2007;1:1-10.

Schlenker W, Roberts MJ. Nonlinear temperature effects indicate severe damages to U.S. crop yields under climate change. Proc. Natl. Acad. Sci. USA. 2009;106:1594-1598.

Schrader SM, Wise RR, Wacholtz WF, Ort DR, Sharkey TD. Thylakoid membrane responses to moderately high leaf temperature in Pima cotton. Plant Cell Environ. 2004;27:725-735.

Sharma P, Jha AB, Dubey RS, Pessarakli M. Reactive oxygen species, oxidative damage, and antioxidative defense mechanism in plants under stressful conditions. J Bot. 2012;26. Article ID 217037,

Allen DJ, Ort DR. Impact of chilling temperatures on photosynthesis in warm climate plants. Trends Plant Sci. 2001;6:36-42.

Kratsch HA, Wise RR. The ultrastructure of chilling stress. Plant Cell Environ. 2000;23:337-350.

Yang MT, Chen SL, Lin CY, Chen YM. Chilling stress suppresses chloroplast development and nuclear gene expression in leaves of mung bean seedlings. Planta. 2005;221:374-385.