An auxin-mediated ultradian rhythm positively influences root regeneration in .

Ultradian rhythms have been proved to be critical for diverse biological processes. However, comprehensive understanding of the short-period rhythms remains limited. Here, we discover that leaf excision triggers a gene expression rhythm with ~3-h periodicity, named as the excision ultradian rhythm (UR), which is regulated by the plant hormone auxin.

Identification and Validation of Candidate Genes Conferring Resistance to Downy Mildew in Maize ( L.).

Downy mildew (DM) is a major disease of maize that causes significant yield loss in subtropical and tropical regions around the world. A variety of DM strains have been reported, and the resistance to them is polygenically controlled. In this study, we analyzed the quantitative trait loci (QTLs) involved in resistance to (sorghum DM), (Java DM) (crazy top DM) using a recombinant inbred line (RIL) from a cross between B73 (susceptible) and Ki11 (resistant), and the candidate genes for , , and resistance were discovered.

Transcriptome Analysis of Flowering Time Genes under Drought Stress in Maize Leaves.

Flowering time is an important factor determining yield and seed quality in maize. A change in flowering time is a strategy used to survive abiotic stresses. Among abiotic stresses, drought can increase anthesis-silking intervals (ASI), resulting in negative effects on maize yield.

Identification of downy mildew resistance gene candidates by positional cloning in maize ( subsp. ; Poaceae).

Premise Of The Study: Positional cloning in combination with phenotyping is a general approach to identify disease-resistance gene candidates in plants; however, it requires several time-consuming steps including population or fine mapping. Therefore, in the present study, we suggest a new combined strategy to improve the identification of disease-resistance gene candidates.

Methods And Results: Downy mildew (DM)-resistant maize was selected from five cultivars using a spreader row technique.

PLANEX: the plant co-expression database.

Background: The PLAnt co-EXpression database (PLANEX) is a new internet-based database for plant gene analysis. PLANEX (http://planex.plantbioinformatics.