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This paper explores the balance of acid-base regulation and osmolarity generation during plant growth, focusing on cost considerations.

September 1, 1985New PhytologistOpen Access

TANSLEY REVIEW No. 2

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This paper explores the balance of acid-base regulation and osmolarity generation during plant growth, focusing on cost considerations.
Reviewed processes of intracellular acid-base maintenance and osmolarity generation in plants.
Computed costs for nitrogen assimilation and osmolarity generation using stoichiometries of biochemical reactions.
Assessed photon, water, and nitrogen costs tied to different nitrogen sources (NH4+, N2, NO3−).
Using N2 as a nitrogen source increases photon costs by 9% compared to NH4+.
Growth with NO3− can cost 5-12% more than NH4+, depending on reduction mechanisms.
Implementation of compatible solutes for osmolarity generation increased growth costs significantly, by up to 26% for total growth.

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Review analyzes acid-base balance and osmolarity benefits in terrestrial plants, suggesting cost implications.

John A. Raven (1985) studied this question.

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