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Positive effects of elevated CO$_{2}$ and its interaction with nitrogen on safflower physiology and growth

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Positive effects of elevated CO$_{2}$ and its interaction with nitrogen on safflower physiology and growth

Content Provider	Springer Nature Link
Author	Mohamed, Shiren J. Jellings, Anita J. Fuller, Michael P.
Copyright Year	2013
Abstract	Over the last two decades, the impact of elevated CO$_{2}$ on crops has become a major issue in the context of climate change. Increasing CO$_{2}$ levels should modify the plant demand for nutrients, but precise effects on plant physiology are poorly known. Here, we studied the effect of ambient CO$_{2}$ at 400 μmol mol$^{−1}$ and high CO$_{2}$ at 1,000 μmol mol$^{−1}$ on safflower (Carthamus tinctorius L.) at N levels from 25 to 175 kg ha$^{−1}$. Growth and physiology of safflower were assessed in pots in controlled enclosure chambers in a glasshouse. Overall results show that high CO$_{2}$ increased assimilation rate by +27 %, leaf area index (LAI) by +28 %, total above-ground dry weight by +51 %, and total above-ground dry weight by +43 % at harvest. High CO$_{2}$ reduced stomatal conductance by −29 % and transpiration rate by −18 %. At anthesis, results show that high CO$_{2}$ increases assimilation rate by +13 %, LAI by +2 %, and above-ground dry weight by +34 %. At anthesis, results also show that high CO$_{2}$ decreases leaf N and chlorophyll content.
Starting Page	497
Ending Page	505
Page Count	9
File Format	PDF
ISSN	17740746
Journal	Agronomy for Sustainable Development
Volume Number	33
Issue Number	3
e-ISSN	17730155
Language	English
Publisher	Springer-Verlag
Publisher Date	2013-03-15
Publisher Institution	Institut National de la Recherche Agronomique (INRA)
Publisher Place	Paris
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Elevated CO$_{2}$ Safflower Gas exchange Assimilation rate LAI Biomass Agriculture Soil Science & Conservation Sustainable Development
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Agronomy and Crop Science

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Positive effects of elevated CO$_{2}$ and its interaction with nitrogen on safflower physiology and growth

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Positive effects of elevated CO$_{2}$ and its interaction with nitrogen on safflower physiology and growth