Next Article in Journal
Cuticular Waxes of Arabidopsis thaliana Shoots: Cell-Type-Specific Composition and Biosynthesis
Previous Article in Journal
Occurrence and Biosynthesis of Alkyl Hydroxycinnamates in Plant Lipid Barriers
Article Menu

Export Article

Open AccessArticle
Plants 2017, 6(3), 26; doi:10.3390/plants6030026

Variation in Yield Responses to Elevated CO2 and a Brief High Temperature Treatment in Quinoa

Crop Systems and Global Change Laboratory, United States Department of Agriculture, 10300 Baltimore Avenue, Beltsville, MD 20705-2350, USA
Academic Editor: Milan S. Stankovic
Received: 13 June 2017 / Revised: 30 June 2017 / Accepted: 3 July 2017 / Published: 5 July 2017
(This article belongs to the Special Issue Plant Adaptation to Climate Change)
View Full-Text   |   Download PDF [665 KB, uploaded 5 July 2017]   |  

Abstract

Intraspecific variation in crop responses to global climate change conditions would provide opportunities to adapt crops to future climates. These experiments explored intraspecific variation in response to elevated CO2 and to high temperature during anthesis in Chenopodium quinoa Wild. Three cultivars of quinoa were grown to maturity at 400 (“ambient”) and 600 (“elevated”) μmol·mol−1 CO2 concentrations at 20/14 °C day/night (“control”) temperatures, with or without exposure to day/night temperatures of 35/29 °C (“high” temperatures) for seven days during anthesis. At control temperatures, the elevated CO2 concentration increased the total aboveground dry mass at maturity similarly in all cultivars, but by only about 10%. A large down-regulation of photosynthesis at elevated CO2 occurred during grain filling. In contrast to shoot mass, the increase in seed dry mass at elevated CO2 ranged from 12% to 44% among cultivars at the control temperature. At ambient CO2, the week-long high temperature treatment greatly decreased (0.30 × control) or increased (1.70 × control) seed yield, depending on the cultivar. At elevated CO2, the high temperature treatment increased seed yield moderately in all cultivars. These quinoa cultivars had a wide range of responses to both elevated CO2 and to high temperatures during anthesis, and much more variation in harvest index responses to elevated CO2 than other crops that have been examined. View Full-Text
Keywords: quinoa; elevated CO2; high temperature stress; photosynthesis; harvest index; seed yield quinoa; elevated CO2; high temperature stress; photosynthesis; harvest index; seed yield
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Bunce, J.A. Variation in Yield Responses to Elevated CO2 and a Brief High Temperature Treatment in Quinoa. Plants 2017, 6, 26.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Plants EISSN 2223-7747 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top