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CactiBiology and Uses$
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Park Nobel

Print publication date: 2002

Print ISBN-13: 9780520231573

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520231573.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 30 June 2022

Environmental Biology

Environmental Biology

(p.57) Chapter 4 Environmental Biology

Park S. Nobel

Edward G. Bobich

University of California Press

This chapter discusses gas exchange and other environmental responses of cacti. It focuses on net CO2 uptake and examines the influence of three key environmental factors—temperature, soil moisture, and solar irradiation absorbed by photosynthetic pigments, i.e., the photosynthetic photon flux (PPF)—on CO2 uptake by Opuntia ficus-indica. The response of net CO2 uptake by Opuntia ficus-indica to these three variables is important for predicting its productivity under any environmental condition and serves as a model for assessing the net CO2 uptake, and hence the potential biomass productivity, of other cacti.

Keywords:   gas exchange, environmental responses, cacti, CO2 uptake, temperature, soil moisture, photosynthetic photon flux, PPF, Opuntia ficus-indica, biomass productivity

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