Yarı Kurak Alanlarda Bulunan Melilotus officinalis (L.) Desr. ve Melilotus alba Desr. (Fabaceae) Taksonlarının Fitojeomorfolojik Özellikleri

Cytokinin induces expansin gene expression in Melilotus alba Desr. wild-type and the non-nodulating, non-mycorrhizal (NodMyc) mutant Masym3.

We previously showed that applying 10(-6) M of the cytokinin 6-benzylaminopurine (BAP) to uninoculated roots of Masym3, a Nod(-)Myc(-)Melilotus alba (Desr.) mutant, resulted in the accumulation of MaENOD40 transcripts to levels similar to BAP-treated wild-type roots. In contrast, inoculation with a Nod(-)S. meliloti mutant expressing the trans-zeatin synthase gene of Agrobacterium tumefaciens (...

ENOD40 Gene Expression and Cytokinin Responses in the Nonnodulating, Nonmycorrhizal (NodMyc) Mutant, Masym3, of Melilotus alba Desr.

Several nonnodulating, nonmycorrhizal (Nod(-)Myc(-)) mutants of Melilotus alba Desr. (white sweetclover) have been described. However, the details of their responses to Sinorhizobium meliloti have not been fully elucidated. We investigated rhizobial entry and colonization using Confocal Scanning Laser Microscopy on the Masym1-5 mutants and isolated an early nodulin (ENOD40) gene from wild-type ...

The biosynthesis of coumarin in Melilotus alba.

Previous investigations have shown that CY4-labeled transcinnamic acid is rapidly converted to o-coumaric acid P-glucoside by shoots of Melilotus alba (white sweet clover) (1) and Hierochlod odorata (sweet grass) (2). This glucoside is then converted to coumarin (l-3), possibly by way of trans-cis isomerization of the glucoside to coumarinic acid P-glucoside. The small amount of radioactivity f...

Investigation of Four Classes of Non-nodulating White Sweetclover (Melilotus alba annua Desr.) Mutants and Their Responses to Arbuscular-Mycorrhizal Fungi.

The nitrogen-fixing symbiosis between Rhizobiaceae and legumes is one of the best-studied interactions established between prokaryotes and eukaryotes. The plant develops root nodules in which the bacteria are housed, and atmospheric nitrogen is fixed into ammonia by the rhizobia and made available to the plant in exchange for carbon compounds. It has been hypothesized that this symbiosis evolve...

Effect of Genotype and Growth Stage on Distribution of Melilotic Acid, o-Coumaric Acid, and Coumarinic Acid in Melilotus alba Desr