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Projects / Programmes source: ARIS

Physiological indicators of stress in cultivated plants

Research activity

Code Science Field Subfield
4.03.00  Biotechnical sciences  Plant production   

Code Science Field
T430  Technological sciences  Food and drink technology 
Keywords
drought, UV-B radiation, cultural plants
Evaluation (rules)
source: COBISS
Researchers (3)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  29092  PhD Maarten De Groot  Forestry, wood and paper technology  Researcher  2007  706 
2.  15122  PhD Mateja Germ  Biology  Head  2004 - 2007  593 
3.  07390  PhD Olga Urbanc-Berčič  Biology  Researcher  2004 - 2007  277 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0105  National Institute of Biology  Ljubljana  5055784  13,251 
Abstract
Damages on cultivated plants due to the changes in local and global climate; i. e. warming, increased UV-B radiation, and extreme weather events are reflected in lowering the photosynthesis and productivity of plants, and are resulted in decreased yield of cultivated plants. Very negative effects on cultivated plants are evidenced to arise during long drought periods. Amount of available water in the soil is lowered. Additional problem presents low amount of organic matter in the soil as a result of current non-sustainable agricultural practice. Another environmental factor, actual in last decades, is the increase of UV-B radiation on the Earth surface due to thinning of ozone layer, what may have negatively effects on organisms, including cultural plants. Chlorophyll fluorescence measurement, aplied in this research, was evolved as a very useful and informative indicator for photosynthetic electron transport, and reflects the status of the plants. The method is nondestructive, and enable measuring of the stress before physical changes can be observed. Different species and cultivars have different sensitivity to environmental stress. The study of certain species and cultivars in local climate will give us the answers about their response on specific stress. Less tolerant species may have lower production, that is especialy important in the case of cultural plants. Original contribution of this research will be the knowledge on the differences in responses of cultivars of maize, pumpkins, apples, and potatoes, to drought and UV-B radiation. On the basis of the results, breeding of species and cultivars, less susceptible to drought and UV-B radiation will be suggested.
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