- 著者
-
Agarie Sakae
Kawaguchi Akiko
Kodera Akiko
Sunagawa Haruki
Kojima Hide
Nose Akihiro
Nakahara Teruhisa
- 出版者
- 日本作物学会
- 雑誌
- Plant production science (ISSN:1343943X)
- 巻号頁・発行日
- vol.12, no.1, pp.37-46, 2009-01
We measured the concentration of polyols (pinitol, ononitol, and myo-inositol), which are known to have health-promoting and/or disease-preventing functions, in the common ice plant (Mesembryanlhemum crystallinum L.) cultured under salt- and drought-stressed treatments. In NaCl-treated plant the concentration of pinitol/ononitol increased with increasing NaCl concentration in culture solution. The maximal concentration was 3.6mg g^<-1> FW, which was found in the shoot top, followed by small side shoots (2.1mg g_<-1> FW) of mature plants grown with 400mM NaCl for 35 ds. The drought stress also accelerated the accumulation of pinitol/ononitol. The maximal concentration was 1.2mg g^<-1> FW, which was found in the shoot top of plants under the stress for 25 ds. The myo-inositol increased in salt-stressed plants at 3 ds after the start of the treatment and then decreased with the lapse of time during stress. The concentration of polyols in the ice plant was comparable to that in the other species reported to accumulate polyols at high levels. Radical scavenging activity evaluated by DPPH assay was increased two-fold by 400mM NaCl treatment, which was twice as high as that in the leaves of lettuce (Lactuca sativa L.). These results indicated the high potential of the ice plant as a polyol-rich high-functional food.