Semipermeable Membrane System for Subjecting Plants to Water Stress | Zendy

David T. Tingey | Zendy; Cynthia Stockwell | Zendy

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Semipermeable Membrane System for Subjecting Plants to Water Stress

Author(s) -

David T. Tingey,

Cynthia Stockwell

Publication year - 1977

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.60.1.58

Subject(s) - semipermeable membrane , vermiculite , phaseolus , polyethylene glycol , membrane , peg ratio , water stress , chemistry , osmotic shock , root system , botany , horticulture , biology , biochemistry , finance , gene , economics

A system was evaluated for growing plants at reproducible levels of water stress. Beans (Phaseolus vulgaris L.) were grown in vermiculite, transferred to a semipermeable membrane system that encased the root-vermiculite mass, and then placed into nutrient solutions to which various amounts of polyethylene glycol (PEG) 20M were added to control solution water potential. The membrane (Spectrapor 1) had a minimum molecular weight cutoff that excluded the PEG 20M. The plants equilibrated with the nutrient solution within 1 to 4 days, and exhibited normal diurnal water relations. Use of the semipermeable membrane system to induce water stress reduces many of the problems associated with hydroponic media.

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