Effects of water deficit on shoot, root and some physiological characteristics in some greenhouse grown potato cultivars
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ORIGINAL RESEARCH
Effects of water deficit on shoot, root and some physiological characteristics in some greenhouse grown potato cultivars Mouhamad Alhoshan1 · Ali Akbar Ramin1 · Morteza Zahedi2 · Mohammad R. Sabzalian2 Accepted: 15 May 2020 © Korean Society of Crop Science (KSCS) 2020
Abstract A greenhouse experiment was conducted to evaluate the response of ten potato cultivars to two levels of soil water in terms of contents of total chlorophyll (Chltot), chlorophyll florescence (Fv/Fm), shoot fresh weight (SFW), shoot dry weight (SDW), root fresh weight (RFW), root dry weight (RDW), mean root length (MRL), root length density (RLD), special root length (SRL), root volume (RV), ascorbate peroxidase (APX), peroxidase (POX) and proline content. Plants were grown under two irrigation levels (30 and 80% depletion of available soil water). Greenhouse test plots were arranged in a randomized complete block design with four replications. Under control level of irrigation, the maximum and the minimum shoot dry weight were achieved for cultivars Satina (12.7 g/plant) and Santé (4.7 g/plant) and root dry weight for Marfona (2.95 g/ plant) and Milva (1.17 g/plant), respectively. SDW and RDW were decreased in all cultivars under 80% depletion of available soil water. Based on the biplot analysis cultivars Agria, Satina and Marfona were hence identified as preferable cultivars for 80% depletion of available soil water conditions. However, this investigate has been able to gather evidence that water deficit increased the activities of antioxidant enzymes and proline content in all tested potato cultivars. Also, our results revealed the pivotal role of proline in response of potato plants to water deficit and biomass production. Keyword Potato · Water deficit · Shoot dry weight · Chlorophyll · Antioxidant enzymes · Proline Abbreviations Chltot Total Chlorophyll Fv/Fm Chlorophyll florescence SFW Shoot fresh weight SDW Shoot dry weight RFW Root fresh weight RDW Root dry weight MRL Mean root length * Mouhamad Alhoshan [email protected] Ali Akbar Ramin aa‑[email protected] Morteza Zahedi [email protected] Mohammad R. Sabzalian [email protected] 1
Department of Horticulture, College of Agriculture, Isfahan University of Technology, IUT Isfahan, 84156‑83111 Isfahan, Iran
Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, IUT Isfahan, 84156‑83111 Isfahan, Iran
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RLD Root length density SRL Specific root length RV Root volume APX Ascorbate peroxidase activity POX Peroxidase activity Pro Proline STI Stress tolerance index
Introduction Potatoes (Solanum tuberosum L.) are grown in most countries of the world and consider one of the tuber bulbs and root vegetable crops which occupy the fourth great‑ est important food resource after wheat, maize and rice (Vreugdenhil et al. 2007). Generally, a great challenge in the future increases demand for nutrition products and for fresh water resources as a result of increasing a predicted world population o
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