Drought Effects on the Synchrony of Aboveground and Belowground Phenology of Five Potato Clones
Julia Hoelle1, Leah Kuppinger1, Jesus Zumaran1, Evelyn Farfan2, Muhammad Awais Khan3, Merideth Bonierbale2, Folkard Asch1
1University of Hohenheim, Inst. of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), Germany
Literature describes the belowground and aboveground development of potato to be closely and quasi-linearly related. For example, bud formation is synchronous with tuber initiation and flowering with tuber filling. Thus, many agronomic and breeding studies in potato use non-destructive aboveground phenology to assess belowground development. No information is currently available on the influence of water deficit or salinity on the synchrony of aboveground and belowground development in potato. In order to assess the effects of water deficit on belowground development of potato it is important to know if the synchrony between aboveground and belowground development is maintained or broken. A field experiment with 5 potato genotypes was conducted between October 2013 and February 2014 in a costal arid region of southern Peru. Plants were subjected to four irrigation treatments: fully watered, early drought (withholding irrigation 50 days after planting, DAP), intermediate (65 DAP) and late drought (80 DAP). In 5-day intervals after withholding water, detailed belowground and aboveground development was recorded.
Keywords: Abiotic stress, phenological development, Solanum tuberosum
Contact Address: Julia Hoelle, University of Hohenheim, Inst. of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), Garbenstraße. 13, 70599 Stuttgart, Germany, e-mail: julia.hoelleuni-hohenheim.de