Triterpene Alcohols of Seed-Bearing Plants (SPERMATOPHYTA)

an evaluation of nitrogen and phosphorous efficiency in sugar beet seed bearing plants

to assess the effects of different levels of nitrogen and phosphorous on yield and nutrient use efficiency of sugar beet (polygerm seed (cv. 7233)), this study was carried out in 1999-2001 in ardabil agricultural research station (alarough). the experiment contained two factors of: nitrogen in 4 levels (control, 100, 200 and 300 kg n/ha) and phosphorous in 3 levels (control, 100 and 200 kg p2o5...

Seed Disorders of Forage Plants

rots (Great Plains); seedling blight (Great Plains). Indian ricegrass {Oryzopsis hymenoides) : Seedling blight (far West) ; common root rot and crown rot (far West) ; rhizoctonia rot (scattered) ; snow molds (Pacific Northwest); seed rots (general); root necrosis and crown rots (far West). Kentucky bluegrass {Poa pratensis): Dollar spot (Northeast) ; brown patch (general); foot rot, Helminthosp...

Biogeographical parallels between plants and ants in North American deserts (Hymenoptera: Formicidae; Spermatophyta)

Water is the most limiting factor in deserts, yet researchers have very different emphases on the relative importance of water, depending on the organisms that they study. For example, soil moisture is considered the most critical factor for recruitment of desert succulent plants, and numerous studies have linked plant distribution patterns with soil texture, rainfall, and soil moisture. By com...

Comparative Study of Colchicine Bearing Plants

The hydroxyl radical in plants: from seed to seed.

The hydroxyl radical (OH(•)) is the most potent yet short-lived of the reactive oxygen species (ROS) radicals. Just as hydrogen peroxide was once considered to be simply a deleterious by-product of oxidative metabolism but is now acknowledged to have signalling roles in plant cells, so evidence is mounting for the hydroxyl radical as being more than merely an agent of destruction. Its oxidative...