title: [Elevated air temperatures tolerance of chufa (Cyperus esculentus L.), a phototroph component of life support systems].
abstract: Resistance of biotechnical life support systems (BTLSS) to stress-factors depends, in addition to some other conditions, on tolerance of higher plants as part of the photosynthesizing component. Purpose of the investigations with chufa Cyperus esculentus L. cultivation on mineralized solid and liquid human wastes (according to Yu. Kudenko) was to test plant tolerance of air temperature rise to 45 degrees C. Tolerance was assessed as a function of nitrogen form in nutrient solutions and PAR intensity during thermal shock. PAR intensity was controlled at 150 W/m2 and air temperature--at 25 degrees C. Thermal shock was induced in 30-day plants with PAR = 150 or 250 W/m2. Twenty hours at 45 degrees C did not cause irreversible damage of the plant photosynthetic apparatus. Higher PAR intensity (250 W/m2) and nitrates in nutrient solution mitigates substantially the damaging effect of the stress factor
authors.forename: E S
authors.initials: ES
authors.lastname: Shklavtsova
authors.forename: S A
authors.initials: SA
authors.lastname: Ushakova
authors.forename: V N
authors.initials: VN
authors.lastname: Shikhov
mesh_terms: D000388:Air; D029786:Cyperus / Q000502:physiology*; D006801:Humans; D008021:Life Support Systems / Q000295:instrumentation*; D010788:Photosynthesis / Q000502:physiology*; D052817:Phototrophic Processes / Q000502:physiology*; D018531:Spacecraft; D013696:Temperature