Growth and solasodine production bySolanum aviculareandSolanum laciniatumunder moisture stress at different temperatures

Abstract

Cloned plants were grown in growth-chambers for 82 days under day/night temperatures of Is o / 10°, 20°/10°, 20°/1 So, 2So/1So, and 2So/20°C. Dry matter yields were greatest at 2SoC daytime temperatures. Solanum laciniatum also grew well in the coldest conditions, whereas growth of S. aviculare was depressed at the two lowest temperatures.Solasodine concentrations in leaves and particularly in sterns were lower at the warrnest temperatures. Total solasodine yield per plant remained approximately constant because of compensatory vegetative growth, except at the two temperature extremes. Fruiting was greatly enhanced by 20 0/IO°C treatment of S. laciniatum but S. aviculare did not respond. Severe moisture stress limited growth but increased solasodine concentrations in sterns and leaves; total solasodine production was reduced. A field trial showed that mild moisture stress, from withholding irrigation, lowered dry matter yields but had no effect on solasodine concentration, i.e., solasodine production per plant was less without irrigation.

Saponosides stéroïdiques de l'aubergine (Solanum melongena L.) II. Variations des teneurs liées aux conditions de récolte, aux génotypes et à la quantité de graines des fruits

“…C'est une observation de pratique courante que les fins de production en serre, comme au champ, donnent parfois des fruits inacceptables sur le plan gustatif. Juvik et al (1982), Man et al (1980), Yaniv et al (1984) ont montré que les saponosides interviennent dans la réponse des plantes aux variations climatiques. De plus, Defago (1977) et Rowan et al (1983) (Fig.…”

“…1) comme pour les SNA (Fig. 2) (Heftmann, 1983;Man et al, 1980). Khristov (1975) (Daunay, 1986;Pochard 1973, Pochard & Serieys, 1974Pochard & Cornillon, 1975) (Moutot, 1976 …”

Poroporo (Solanum aviculareForst): A summary and discussion of some recent agronomic research in New Zealand

“…Also, growth chamber studies by Mann et al (1980) have indicated that night temperatures of 10°C suppress solasodine yield S . aviculare but not S .…”

Variability of Yield Characters and Selection in Solanum ladniatum Ait.

“…To establish S. laciniatum as a crop species, influences of environmental factors and cultivation have been studied in various climatic zones (MANN et al 1980, BHARATI and CHATTERjEE 1986, KRUG 1989.…”