Agriculture Reference
In-Depth Information
Table 17
The correlation coeffi cients (r) between dry matter accumulation as well
as starch accumulation with sucrose to starch conversion enzymes in rice CV.
Tainung 67.
Parameter rate
Drymatter
Accumulation
Starch Accumulation
Starch accumulation rate
0.99**
--
SUS
0.41*
0.19
Invertase
0.42*
0.52**
Hexokinase
0.76**
0.54**
Phosphoglucoisomerase
0.21
0.18
Phosphoglucomutase
0.65**
0.56**
AG Pase
0.64**
0.42**
UD Pase
0.37
0.27
SSS
0.73**
0.67**
GBSS
0.02
0.07
SBE
0.69**
0.58**
SDBE
0.23
0.12
Soluble protein
0.62**
0.52**
(after Tseng et al. 2003)
enzymes (viz. a-amylase, b-amylase) increased in ABA treated
leaf sheaths and fructose transporter gene expression was up
regulated. However, ABA repressed the activities of some starch
biosynthesis enzymes (i.e., ADP-glucose pyrophosphorylase,
granule bound starch synthase) in leaf sheaths. These results
suggest that ABA plays an important role in promoting starch
degradation and sucrose remobilization in upper leaf sheaths
at the post heading stage.
The degradation of storage proteins happened mainly at
the late stage of germination phase II (48hr imbibition). In
addition to alpha-amylase, the up-regulated proteins were
