... the biosynthesis of the porphyrin
ring.
Assimilation of Mineral Nutrients 277
Assimilation of Mineral
Nutrients
12
Chapter
HIGHER PLANTS ARE AUTOTROPHIC ORGANISMS that can syn-
thesize their ... regulation of nitrite
reduction in higher plants.
Physiol. Plant. 89: 607– 612.
282 Chapter 12
Assimilation of other nutrients, especially the macronu-
trient and m...
... detailed discussion of the Cohesion–Tension
theory on sap ascent in plants,and some alterna-
tive explanations.
4.3 How Water Climbs to the Top of a 11 2- Meter-
Tall Tree
Measurements of photosynthesis ... the acquisi-
tion of water by plant roots. Annu. Rev. Plant Physiol. Plant Mol.
Biol. 52: 847–875.
Steudle, E., and Frensch, J. (1996) Water transport in plants: Role of
th...
... deter-
mined by plant tissue analysis.
Proper use of plant tissue analysis requires an under-
standing of the relationship between plant growth (or
yield) and the mineral concentration of plant ... soil, plants encounter salt stress. Whereas
many plants are affected adversely by the presence of rel-
atively low levels of salt, other plants can survive high lev-
els (salt-t...
... In addition, these plants do not
extend their hypocotyls in response to far-red light given
at the end of each photoperiod (called the
end -of- day far-red
response
). Both of these responses ... chloroplast pro-
teins: the small subunit of ribulose-1,6-bisphosphate car-
boxylase/oxygenase (rubisco) and the major light-harvest-
ing chlorophyll
a/b–binding proteins associated with the...
... AMO-1618
Control
AMO-1618
AMO-1618 + GA
20
AMO-1618 + GA
1
30
10
20
0
12
Stem length (cm)
40
14 16 18 20 22 24
(B) BX- 112
Number of long days
Control
BX- 112
BX- 112 + GA
20
BX- 112 + GA
1
AMO-1618, which ... light-grown plants
would contain less GA
1
than dark-grown plants. However,
light-grown plants turned out to contain
more GA
1
than
dark-grown plants—indicating that de-etiolat...
... phosphoryla-
tion and activation of a subset of the type-B ARR proteins.
Activation of the type-B proteins (transcription factors)
leads to the transcriptional activation of the type-A genes.
The type-AARR ... auxin. The principal cytokinin of higher
plants—zeatin, or
trans- 6-( 4-hydroxy-3-methylbut-2-eny-
lamino)purine—is also present in plants as a riboside or
ribotide and as...
... changed.
(A)
(B)
(D)
(C)
Amplitude Period
12D 12L
26 h24 h
12D 12L 12D 12L (h)
(h)
12D 12L 12D 12L 12D 12L (h)
Light
pulse
Rephased
rhythm
Light
FIGURE 24.15 Some characteristics of circadian rhythms.
amplitude ... length
R
R
FR
FR
R
R
R
FR
FR
R
Long-day (short-night) plant
Short-day (long-night) plant
FIGURE 24.22 Phytochrome control
of flowering by red (R) and far-red
(FR) light. A...
... frames of reference of a biological unity.
This chapter provides an overview of the basic anatomy of plants,
from the organ level down to the ultrastructure of cellular organelles. In
subsequent chapters ... outer diameter of 25 nm; they are com-
posed of polymers of the protein tubulin. The tubulin
monomer of microtubules is a heterodimer composed of
two similar polypep...
... [L]
(Leu)
Isoleucine [I]
(Ile)
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
C
CH
2
C
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
-
COO
H
3
N
+
H
3
N
+
H
3
N
+
+
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N
+
H
3
N...
... within the Plant
Just as Y
w
values depend on the growing conditions and
the type of plant, so too, the values of Y
s
can vary consid-
erably. Within cells of well-watered garden plants (exam-
ples ... index of
the water stress the plant is experiencing (see Chapter 25).
Figure 3 .12 also shows representative values for Y
w
at
various stages of water stress. In leaves of w...