| RRC ID |
66893
|
| Author |
Kariya K, Ube N, Ueno M, Teraishi M, Okumoto Y, Mori N, Ueno K, Ishihara A.
|
| Title |
Natural variation of diterpenoid phytoalexins in cultivated and wild rice species.
|
| Journal |
Phytochemistry
|
| Abstract |
Rice (Oryza sativa) leaves accumulate phytoalexins in response to pathogen attack. The major phytoalexins in rice are diterpenoids such as momilactones, phytocassanes, and oryzalexins. We analyzed the abundance of momilactones A and B and phytocassanes A and D in UV-light-irradiated leaves of cultivars from the World Rice Core Collection (WRC). Both types of phytoalexins were detected in most cultivars; however, their accumulated amounts varied greatly from cultivar to cultivar. The amounts of momilactones A and B tended to be higher in japonica cultivars than those in indica cultivars. However, the accumulated amounts of phytocassanes were not related to differences in subspecies. In addition, variation in phytoalexin content was observed for seven wild rice species. During the analysis of momilactone A in cultivars from the WRC, two unknown compounds were detected in'Jaguary' and 'Basilanon'. We isolated these compounds from UV-light-irradiated leaves and determined their structures. The compound isolated from 'Jaguary' was an isomer of momilactone A that had an abietane skeleton, while that from 'Basilanon' was di-dehydrogenated phytocassane A; these compounds were denoted as oryzalactone and phytocassane G. Oryzalactone accumulated in only three cultivars, whereas phytocassane G accumulated in almost all of the cultivars from the WRC. These findings indicate the existence of large natural variation in the phytoalexin composition in rice.
|
| Volume |
180
|
| Pages |
112518
|
| Published |
2020-12-1
|
| DOI |
10.1016/j.phytochem.2020.112518
|
| PII |
S0031-9422(20)30739-1
|
| PMID |
32950772
|
| MeSH |
Diterpenes
Oryza*
Phytoalexins
Plant Leaves
Sesquiterpenes*
|
| IF |
3.044
|
| Resource |
| Rice |
W0130
W0170
W0610
W1230
W1295
W1818
W1921
W2299
W0120
W0596
W1236
W1292
W1715
W1798
W2052
W2310
W0318
W0141
W0593
W1244
W1294
W1777
W1807
W1973
W2078
W0698
W1432
W1588
W1643
W1196
W1196
W2140
W2192
W2112
W2113
W2115
W2117
W1514
W1582
W1590
W1593
W1402
W1703
W1711 |
