4.7 Review

Morphophysiology of Potato (Solanum tuberosum) in Response to Drought Stress: Paving the Way Forward

期刊

FRONTIERS IN PLANT SCIENCE
卷 11, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2020.597554

关键词

drought; stress tolerance; climate change; crop morphophysiology; food security; potato; Solanum tuberosum L; high-throughput phenotyping

资金

  1. BBSRC Waitrose Collaborative Training Partnership studentship
  2. Branston Potatoes Ltd. [BB/T509036/1]

向作者/读者索取更多资源

The cultivated potato is an important food crop globally and in developing countries, but climate change poses a threat to its yields as it becomes hotter and drier in some regions. Besides its shallow root system, other morphophysiological features of the potato are likely contributing to its drought susceptibility. Research explores traits associated with drought tolerance in potatoes, such as small canopies, open stem-type canopies, and densely rooted cultivars, which have been overlooked in the past.
The cultivated potato (Solanum tuberosum L.) is currently the third most important food crop in the world and is becoming increasingly important to the local economies of developing countries. Climate change threatens to drastically reduce potato yields in areas of the world where the growing season is predicted to become hotter and drier. Modern potato is well known as an extremely drought susceptible crop, which has primarily been attributed to its shallow root system. This review addresses this decades old consensus, and highlights other, less well understood, morphophysiological features of potato which likely contribute to drought susceptibility. This review explores the effects of drought on these traits and goes on to discuss phenotypes which may be associated with drought tolerance in potato. Small canopies which increase harvest index and decrease evapotranspiration, open stem-type canopies which increase light penetration, and shallow but densely rooted cultivars, which increase water uptake, have all been associated with drought tolerance in the past, but have largely been ignored. While individual studies on a limited number of cultivars may have examined these phenotypes, they are typically overlooked due to the consensus that root depth is the only significant cause of drought susceptibility in potato. We review this work, particularly with respect to potato morphology, in the context of a changing climate, and highlight the gaps in our understanding of drought tolerance in potato that such work implies.

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