publication . Article . 2018

The sensitivity of sunflower (Helianthus annuus L.) plants to UV-B radiation is altered by nitrogen status

Inês Cechin; Gisely Cristina Gonzalez; Natália Corniani; Terezinha de Fátima Fumis;
Open Access English
  • Published: 08 Feb 2018
  • Publisher: Universidade Federal de Santa Maria
Abstract
EnglishInteraction effects between nitrogen and UV-B radiation were studied in sunflower (Helianthus annuus L. variety IAC-Iarama) plants grown in a greenhouse under natural photoperiod conditions. Plants were irradiated with 0.8W m-2 (control) or 8.0W m-2 (+UV-B) of UV-B radiation for 7h per day. The plants were grown in pots containing vermiculite and watered with 70% of full strength nitrogen-free Long Ashton solution, containing either low (42.3ppm) or high (282ppm) nitrogen as ammonium nitrate. High nitrogen increased dry matter of stem, leaves and shoot, photosynthetic pigments and photosynthesis (A) without any alteration in stomatal conductance (gs) nor ...
Subjects
free text keywords: antioxidants, growth, malondialdehyde, peroxidation, photosynthesis, antioxidantes, crescimento, malondialdeído, peroxidação, fotossíntese, Agriculture, S, Agriculture (General), S1-972, Sunflower, Helianthus annuus, Stomatal conductance, Shoot, Dry matter, Botany, Nitrogen, chemistry.chemical_element, chemistry, Transpiration, Biology, Horticulture
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publication . Article . 2018

The sensitivity of sunflower (Helianthus annuus L.) plants to UV-B radiation is altered by nitrogen status

Inês Cechin; Gisely Cristina Gonzalez; Natália Corniani; Terezinha de Fátima Fumis;