RT poster T1 Boron toxicity in kiwifruit plants A1 Forner-Giner, María A. A1 Martínez-Cuenca, Mary-Rus A1 Primo-Capella, Amparo A1 Quinones, Ana K1 Plant growth K1 F07 Soil cultivation K1 P33 Soil chemistry and physics K1 Boron K1 Proline K1 Transpiration K1 Photosynthesis AB Soils with toxic levels of B are frequent in some agricultural areas throughout theworld, limiting crop productivity. Boron toxicity is an important disorder that canlimit plant growth being a difficult problem to manage. Tolerance to B toxicity varies between plant types and between cultivars of the same species. Severe B toxicity may induce loss of vigour, shorter branches, and even twig dieback. The effectof Boron toxicity in kiwifruit plants has been studied in a trial of Actinidia deliciosa(Chev) Liang and Ferguson cv Tomuri, and cv Hayward conducted in greenhouse.Two different treatments (0 and 250 microM B) in nutrient solutions was appliedduring 60 days, to both cultivars. Plant growth, B concentration and gas exchangeparameters were measured at the end of the experiment. Plant growth did not decrease with the B treatment, although B concentration in leaves and roots increased, especially in Tomuri. As well as Proline content, that is higher in Tomuriplants than in Hayward. Transpiration rate was not affected by B treatment, butphotosynthesis in Hayward decreased rather than Tomuri. YR 2017 FD 2017 LK http://hdl.handle.net/20.500.11939/6727 UL http://hdl.handle.net/20.500.11939/6727 LA en NO Forner-Giner, M. A., Martínez-Cuenca, M. R., Primo-Capella, A., Quinones, A. (2017). Boron toxicity in kiwifruit plants. In: Antunes, Maria D. (ed.) , Book of Abstracts of the IX International Symposium on Kiwifruit held in Porto (Portugal) in 2017, September 6th-9th, pp.123. DS MINDS@UW RD Apr 19, 2021