Agriculture Reference
In-Depth Information
5
FIGURE 3.10
(
See color insert.
) Dry bean leaves and plants with nitrogen deficiency symptoms.
photosynthesis is a reduction in leaf expansion and leaf area and increased sensitivity to water
stress when N deficiency occurs. Physiological responses of N-stressed cotton were similar to those
encountered with water stress (Radin and Mauney, 1986). Similar to water stress, N stress decreases
stomatal and mesophyll conductance of CO
2
(Radin and Ackerson, 1981), decreases hydraulic con-
ductivity, that is, water uptake and transport in the plant (Radin and Parker, 1979; Radin and Boyer,
M
FIGURE 3.11
(
See color insert.
) Dry bean plants with N deficiency symptoms (left) and without N defi-
ciency symptoms (right).
