Seasonal variation in photosystem II efficiency and photochemical reflectance index of evergreen trees and perennial grasses growing at low and high elevations in subtropical Taiwan

Seasonal variation in photosystem II efficiency and photochemical reflectance index of evergreen... Three pines species, three evergreen broadleaf trees, one C3 and two C4 perennial grasses of subtropical Taiwan were studied to elucidate the correlation between photosystem II (PSII) efficiency and photochemical reflectance index (PRI = (R531 – R570)/(R531 + R570)). Measurements were made at two sites differing in altitude (800 and 2600 m) over several growing seasons. At high elevation, potential PSII efficiency, measured by chlorophyll fluorescence (the ratio of variable to maximal fluorescence; Fv/Fm) at predawn, decreased with decreasing air temperature and varied greatly among species. At the lowest air temperature (− °C) studied, variation in Fv/Fm among species ranged from 0.33 to 0.72. In contrast, at low elevation where air temperature was moderate, seasonal variation in Fv/Fm was small in all of the study species. When species, elevation and season data were pooled, despite the high variation in Fv/Fm among species, a good correlation between Fv/Fm and PRI was observed. When compared at the same value of PRI, Fv/Fm of evergreen trees was higher than that of perennial grasses; however, when the minimum temperature on the measurement day was below 0 °C, Fv/Fm was underestimated relative to PRI. We conclude that PRI could be used as a remote indicator of photosynthetic function when air temperature is above 0 °C. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Tree Physiology Oxford University Press

Seasonal variation in photosystem II efficiency and photochemical reflectance index of evergreen trees and perennial grasses growing at low and high elevations in subtropical Taiwan

Loading next page...
 
/lp/oxford-university-press/seasonal-variation-in-photosystem-ii-efficiency-and-photochemical-NPK0NS0lun
Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
ISSN
0829-318X
eISSN
1758-4469
DOI
10.1093/treephys/26.8.1097
Publisher site
See Article on Publisher Site

Abstract

Three pines species, three evergreen broadleaf trees, one C3 and two C4 perennial grasses of subtropical Taiwan were studied to elucidate the correlation between photosystem II (PSII) efficiency and photochemical reflectance index (PRI = (R531 – R570)/(R531 + R570)). Measurements were made at two sites differing in altitude (800 and 2600 m) over several growing seasons. At high elevation, potential PSII efficiency, measured by chlorophyll fluorescence (the ratio of variable to maximal fluorescence; Fv/Fm) at predawn, decreased with decreasing air temperature and varied greatly among species. At the lowest air temperature (− °C) studied, variation in Fv/Fm among species ranged from 0.33 to 0.72. In contrast, at low elevation where air temperature was moderate, seasonal variation in Fv/Fm was small in all of the study species. When species, elevation and season data were pooled, despite the high variation in Fv/Fm among species, a good correlation between Fv/Fm and PRI was observed. When compared at the same value of PRI, Fv/Fm of evergreen trees was higher than that of perennial grasses; however, when the minimum temperature on the measurement day was below 0 °C, Fv/Fm was underestimated relative to PRI. We conclude that PRI could be used as a remote indicator of photosynthetic function when air temperature is above 0 °C.

Journal

Tree PhysiologyOxford University Press

Published: Aug 1, 2006

Keywords: altitude chlorophyll fluorescence leaf spectral reflectance PRI season species subtropical

There are no references for this article.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off