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Respiration rates of intact barley roots at 0.1 mM and 10 mM
[NH
]o.
In one experiment, 1 mM methionine sulfoximine (MSX) was applied to
block NH
metabolism (see text). Relative growth rates
under the two conditions are shown in the Inset. Rice
experienced no significant difference in respiration under the two
NH
regimes (see text).
