Kasipong Kitdamrongsont. Anthocyanin profiles of male bracts of wild banana species in Thailand . Master's Degree(Biochemistry). Mahidol University. : Mahidol University, 2008.
Anthocyanin profiles of male bracts of wild banana species in Thailand
Abstract:
Anthocyanins were isolated from male bracts of 67 wild banana (Musa spp.
and Ensete spp.) accessions distributed in Thailand. With high performance liquid
chromatography (HPLC), mass spectrometry (MS), and tandem mass spectrometry
(MS/MS), six major anthocyanin pigments were identified: delphinidin-3-rutinoside
(m/z 611.2), cyanidin-3-rutinoside (m/z 594.7), petunidin-3-rutinoside (m/z 624.8),
pelargonidin-3-rutinoside (m/z 579.3), peonidin-3-rutinoside (m/z 608.7) and
malvidin-3-rutinoside (m/z 638.8). By type of pigment, wild bananas can be divided
into four groups. The first group, comprised of M. acuminata, M. itinerans and Musa
sp., contained five types of anthocyanin but not pelargonidin-3-rutinoside. The second
group, comprised of M. acuminata subsp. malaccensis, contained three types of
anthocyanin: cyanidin-3-rutinoside, peonidin-3-rutinoside and malvidin-3-rutinoside.
The third group comprises all yellow bract color in which no anthocyanin was
detected. The forth group, comprises of M. balbisiana, M. velutina, M. laterita, M.
acuminata subsp. zebrina and E. superbum, contained cyanidin-3-rutinoside and
delphinidin-3-rutinoside. The three remaining groups, which could not be classified
according to type of pigment, were 1) M. coccinea which contained cyanidin-3-
rutinoside and pelargonidin-3-rutinoside 2) M. ornata which contained only peonidin-
3-rutinoside and 3) M. acuminata subsp. siamea with yellow plus little purple edges
bract color contained delphinidin-3-rutinoside and peonidin-3-rutinoside. Total
anthocyanin contents in analyzed bracts ranging from 0-2.23 μmole/g bract. The
differences between anthocyanin types and proportions revealed a biochemical
diversity of wild bananas, which might be useful for identification of banana species
or inferring flavonoid metabolic evolution among each banana group