Results 141 to 150 of about 3,507 (180)

Castasterone and brassinolide in Raphanus sativus seeds

Phytochemistry, 1991
Abstract Castasterone and brassinolide have been identified from seeds of Raphanus sativus by GC-MS analysis. Comparative quantification experiments with seeds and germinated seeds carried out by GC-SIM indicated a remarkable difference in the ratio of brassinosteroids in favour of the formation of brassinolide during germination.
Takao Yokota
exaly   +2 more sources

Bioactivity of brassinolide methyl ethers

Phytochemistry, 1998
Abstract Four new derivatives of brassinolide (BR) were prepared by single or multiple methylation of the hydroxyl groups at C-2, C-3, C-22 and or C-23 to afford (22 R ,23 R ,24 S )-2 α ,3 α ,23-trihydroxy-22-methoxy-7-oxa-7a-homo-5 α -ergostan-6-one (22-MeBR), (22 R ,23 R ,24 S )-2 α ,3 α ,22-trihydroxy-23-methoxy-7-oxa-7a-homo-5 α -ergostan-6-one ...
Weide Luo, Loeke Janzen, Richard P. Pharis, Thomas G. Back   +3 more
openaire   +1 more source

Improved Synthesis of Castasterone and Brassinolide†

Journal of Chemical Research, 1997
Castasterone 1 is synthesized in 32% overall yield in eight steps from the known (20S)-6,6-ethylenedioxy-20-formyl-3α,5-cyclo-5α-pregnane 4.
Tsuyoshi Watanabe, Suguru Takatsuto, Shozo Fujioka, Akira Sakurai   +3 more
openaire   +1 more source

Brassinolide, a growth‐promoting steroidal lactone

Physiologia Plantarum, 1981
Brassinolide (BR), a naturally‐occurring‐steroidal lactone from rape (Brassica napus L.) pollen, was compared with auxin for activity in a number of bioassay systems. Responses similar to IAA were elicited by BR in bioassays based upon bean hypocotyl hook opening, elongation of maize mesocotyl, pea epicotyl and azuki bean epicotyl sections, and fresh ...
John H. Yopp, N. Bhushan Mandava, J. M. Sasse   +2 more
openaire   +2 more sources

Brassinolide-induced elongation and auxin

Physiologia Plantarum, 1990
exaly   +2 more sources

ChemInform Abstract: Stereoselective Synthesis of the Brassinolide Side Chain: Novel Syntheses of Brassinolide and Related Compounds.

ChemInform, 1990
AbstractThe brassinolide side chain is synthesized stereoselectively following the reaction sequence (I) → (VII).
W. ZHOU, B. JIANG, X. PAN
openaire   +1 more source

Brassinolide analogues without side chain

Collection of Czechoslovak Chemical Communications, 1989
New brassinolide analogues, characterized by a modified androstane structure without substituent in position 17, were prepared. In the second internode assay, 2α,3α-dihydroxy-B-homo-6-oxa-5α-androstan-7-one (XVII) had the highest brassinoid activity.
Ladislav Kohout, Miroslav Strnad
openaire   +1 more source

ChemInform Abstract: A Formal Synthesis of Brassinolide.

ChemInform, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
T. SCHMITTBERGER, D. UGUEN
openaire   +1 more source

The Preparation of the Spirostanic Analogues of Brassinolide and Castasterone.

ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Caridad M. Robaina Rodriguez, Marco Antonio Teixeira Zullo, Helena Mueller Queiroz, Mariangela de Burgos Martins de Azevedo, Esther Alonso Becerra, Francisco Coll Manchado   +5 more
openaire   +1 more source

Brassinolide plays in the hypoxia band

Trends in Plant Science, 2001
The evolution of vascular plants took place in an oxygen-enriched environment, thus, not surprisingly, oxygen is involved in hundreds of metabolic reactions, including the biosynthesis and metabolism of plant growth regulators (e.g. gibberellins, ethylene and brassinolides), as well as in multiple metabolic pathways (i.e.
openaire   +1 more source