The molecular evolution of the alcohol dehydrogenase 1 (Adh1; alcohol:NAD+ oxidoreductase, EC 1.1.1.1) locus in members of the grass family is analyzed. We report the complete DNA sequence of a genomic clone of Adh1 from Pennisetum glaucum cv. Tift 23DB (pearl millet). The gene is characterized by ten exons and nine introns. The 5' flanking region of the gene contains sequences corresponding to...

Apomixis, or clonal propagation through seed, is a trait identified within multiple species of the grass family (Poaceae). The genetic locus controlling apomixis in Pennisetum squamulatum (syn Cenchrus squamulatus) and Cenchrus ciliaris (syn Pennisetum ciliare, buffelgrass) is the apospory-specific genomic region (ASGR). Previously, the ASGR was shown to be highly conserved but inverted in mark...

Empirical and theoretical evidence suggests that facilitation between plants, when it occurs, is more likely during periods of abiotic stress, while competition predominates under more moderate conditions. Therefore, one might expect the relative importance of competition vs. facilitation to vary seasonally in ecosystems characterized by pronounced dry (abiotically stressful) and wet (benign) s...

Tropical forage genetic resources are essential material for the development of adapted pasture crops. Collection, conservation and characterization of these resources are needed to preserve them for future generations. Collections were made after 1970 by CIAT, CSIRO and ILRI. The current status of these collections and present conservation methods are reviewed. Genetic diversity has been asses...

Penelitian ini bertujuan untuk menganalisis pengaruh jarak tanam terhadap pertumbuhan legum Indigofera zollingeriana dan rumput Pennisetum purpureum cv Mott dalam sistem tumpangsari, menggunakan Rancangan Acak Lengkap (RAL) dengan 6 perlakuan 4 ulangan. Perlakuan kombinasi tanam, yaitu, K1: Iz 1,00 m x 0,50 Pp m, K2: 0,750 K3: K4: 0,75 K5: 1,50 K6: m. Variabel yang diukur yaitu tinggi, diameter...

No-till (NT) cropping systems have the potential to enhance soil aggregation, providing physical protection and C sequestration. The existence of discrepancies in impact tillage on aggregation sequestration warrants further studies, particularly for different crop rotations. We hypothesized following: a) NT biannual rotations tend be more effective restoring large macroaggregation concentration...

Résumé P. E. H. Haïr — Milho, meixoeira et autres aliments de la garnison de Sofala, 1505-1525. Les archives du comptoir portugais de Sofala nous éclairent quelque peu sur la nature des plantes alimentaires utilisées au XVIe siècle sur la côte orientale. Les termes milho et meixoeira paraissent désigner respectivement le sorgho et le pennisetum, plutôt que le sorgho et le maïs, comme on l'avait...

In this paper, we investigate the existence of infinitely many solutions for a class of biharmonic equations where the nonlinearity involves a combination of superlinear and asymptotically linear terms. The solutions are obtained from a variant version of Fountain Theorem.