| detailed sterol compositions of two pathogenic rust fungi. | teliospores of cedar-apple rust gymnosporangium juniperi-virginianae were collected from the eastern red cedar juniperus virginiana, and aeciospores of quince rust g. clavipes were collected from the fruit of english hawthorn crataegus laevigata. the sterol fractions were separated by hplc, and their identities were determined by 600 mhz 1h nmr. twenty-six sterols were isolated from g. juniperi-virginianae and 18 sterols were isolated from g. clavipes. the principal sterol of both fungi was (z)- ... | 2004 | 15638244 |
| carotenoids of telial galls of gymnosporangium juniperi-virginianae lk. | in an investigation of the pigments of the telial galls of the common rust fungus gymnosporangium juniperi-virginianae lk. beta- and gamma-carotenes were shown to be the only carotenoids present, with the gamma-isomer predominating. the identification of gamma-carotene was based on its more characteristic properties, behavior on an adsorbent, and its absorption spectra. neither free nor esterified xanthophylls were present, and only traces of chlorophyll. the leaves of the juniper, besides conta ... | 1942 | 17755587 |
| overexpression of the apple mpnpr1 gene confers increased disease resistance in malus x domestica. | the npr1 gene plays a pivotal role in systemic acquired resistance in plants. its overexpression in arabidopsis and rice results in increased disease resistance and elevated expression of pathogenesis-related (pr) genes. an npr1 homolog, mpnpr1-1, was cloned from apple (malus x domestica) and overexpressed in two important apple cultivars, galaxy and m26. apple leaf pieces were transformed with the mpnpr1 cdna under the control of the inducible pin2 or constitutive cauliflower mosaic virus (camv ... | 2007 | 17990964 |