Biology Reference
In-Depth Information
C
HAPTER
4
C
HAPTER
HETEROCYST
1) MORPHOLOGY
166
2) ULTRASTRUCTURE
168
3) BIOCHEMICAL COMPOSITION
169
4) PERMEABILITY TO GASES
171
5) RESPIRATORY ACTIVITY
172
6) CYANOPHYCIN
173
7) DEVELOPMENT
175
8) MUTANTS DEFECTIVE IN HETEROCYST DEVELOPMENT AND
180
NITROGEN FIXATION
9) GENES ESSENTIAL DURING DEVELOPMENT
183
A)
Early genes
:
Regulatory genes
B)
Late genes
C)
Genes for sigma factors
D)
Signal transduction genes
10) SIGNALLING MOLECULES
208
11) CELL DIVISION
211
12) PATTERN FORMATION
212
13) GENES REGULATING THE PATTERN
218
14) NITROGEN FIXATION
224
i)
Genome rearrangement
ii)
Requirements of nitrogen fi xation
