暖季草坪植物之耐寒性與耐寒指標之探討
Date Issued
2002
Date
2002
Author(s)
DOI
902313B002292
Abstract
Warm-season turfgrasses is the common
groundcovers of the parks in Taiwan. Low
temperatures in winter usually have harmful
effects on physiological and morphological
growth of warm-season turfgrasses. The
objectives of this study were to investigate
the chilling tolerance and the screening
criterion for chilling tolerance of
warm-season turfgrasses. When comparing
the relative growth rate （growth rate in low
temperature 15/13 ℃ /growth rate in high
temperature 30/25 ℃ ） of tested grasses,
zoysiagrass and bahiagrass ‘A33’ were more
tolerant to low temperatures, and tropical
carpetgrass was the most sensitive one. In
addition, the values of chlorophyll
fluorescence, electrolyte leakage, and
chlorophyll meter reading （CMR） were
measured for evaluating the index of chilling
tolerance. On the measurements of
chlorophyll fluorescence (Fv/Fm), the results
indicated that centipedegrass under low
temperatures decreased least and recovered
faster than other tested grasses, followed by
zoysiagrass, carpetgrass, and bahiagrass. The
Fv/Fm values of tropical carpetgrass under
low temperatures decreased gradually and
went down to the lowest level. The
electrolyte leakage (%) of tropical carpetgrass
under low temperatures was the highest,
followed by that of carpetgrass, common
bermudagrass, improved bermudagrass,
zoysiagrass and centipedegrass, and that of
bahiagrass was the lowest. In general, the
CMR values of tested turfgrasses except
centipedegrass under low temperature
decreased in the beginning and then
increased later. There was a significant
positive correlations between the relative
growth rate and the relative Fv/Fm ratio
which measured at the 8th day after chilling
treatment, and the r was 0.92***. There were
significant correlations between the relative
growth rate with the relative electrolyte
leakage (%)and the relative CMR values(%),
the r were -0.86*** and 0.80***
respectively. The results showed that
chlorophyll fluorescence (Fv/Fm), electrolyte
leakage, and CMR can be reliable tool to
predict the growth rate of warm-season
turfgrasses under low temperature.
Subjects
chilling injury
chlorophyll fluorescence
electrolyte leakage
screening criterion for chilling tolerance
warm-season turfgrass
Publisher
臺北市：國立臺灣大學園藝學系暨研究所
Type
report
File(s)![Thumbnail Image]()
Loading...
Name
902313B002292.pdf
Size
183.83 KB
Format
Adobe PDF
Checksum
(MD5):59223d29fe75bf8348302d2760bb90b3