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Photoperiodic effects on short-pulse 14C assimilation and overall carbon and nitrogen allocation patterns in contrasting quinoa cultivars


Bendevis, MA and Sun, Y and Rosenqvist, E and Shabala, S and Liu, F and Jacobsen, S-E, Photoperiodic effects on short-pulse 14C assimilation and overall carbon and nitrogen allocation patterns in contrasting quinoa cultivars, Environmental and Experimental Botany, 104 pp. 9-15. ISSN 0098-8472 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Elsevier B.V.

DOI: doi:10.1016/j.envexpbot.2014.03.002


Further understanding of the range of environmental influence on source–sink relationships in quinoa is important to streamlining future crop improvement and efforts concerning geographic expansion of cultivation areas. In the present study a photoperiod sensitive quinoa cv. ‘Achachino’ and photoperiod neutral cv. ‘Titicaca’ were studied under short (10 h) and long (17.5 h) days, with respect to C and N distribution as well as partitioning of newly assimilated C to plant organs. An extended photoperiod resulted in 14C decreasingly being allocated to stem growth and lower leaves in ‘Titicaca’, but increasingly in ‘Achachino’. Both cultivars increased biomass accumulation under extended photoperiod, but in the short day cultivar ‘Achachino’ the extension mostly favoured stem and lower leaf growth and resulted in deteriorated seed development. In contrast, ‘Titicaca’ responded to extended photoperiod with an immediate increase in carbon allocation to upper leaves, and over time to the reproductive structures, resulting in a more than 50% increase in final yield. Collectively the results indicate that even though the photoperiod sensitive cultivar flowered under long photoperiod it did not develop seeds, whereas the photoperiod neutral cultivar in comparison has a wider range in photoperiod plasticity and ability to specifically utilize additional light towards reproductive growth, resulting in an increased yield potential in regions outside of the tropical zone.

Item Details

Item Type:Refereed Article
Keywords:halophyte, quinoa, photoperiod, chenopodium, crop adaptation, source-sink relationship, resource allocation, day length, yield potential
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other plant production and plant primary products
Objective Field:Other plant production and plant primary products not elsewhere classified
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:93060
Year Published:2014
Web of Science® Times Cited:18
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2014-07-09
Last Modified:2017-11-02

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