Safflower (Carthamus tinctorius) is an annual oilseed crop belonging to the Asteraceae family. It adapted semiarid growing conditions and could have expanded potential as alternative, multipurpose in central Argentina other regions. Agronomic ecophysiology research of safflower needed promote its cultivation economic potential. An accurate, standard scale describing phenological growth stages facilitate management research. We describe plants from seed germination harvest maturity according...

About 40,000 km* of the Caldenal in central semiarid Argentina are rangelands where most important economic activity is cow-calf operations.Some information on forage species, mnlnly regarding taxonomy, ecophysiology, and nutritive value, available, but detailed studies composition free-ranging cattle diets lacking.The objective this work was to study botanical seasonai trends southern Caldenal.Diets were studied through microscopic analysis feces collected monthly a typical plant community...

Cattle (Bos taurus) and vizcacha (Lagostomus maximus) diets were examined monthly in the semiarid Caldenal central Argentina.Cow-calf operations are most important economic activities within region.In spite of a widespread distribution Argentina, comparative studies diet cattle scarce.The objective this work was to analyze botanical composition, seasonal trends, possible dietary overlap between vizcacha.Diets determined by microscopic analysis feces collected from November 1994 through...

In sunflower (Helianthus annuus L.), there has been an intense genetic selection for achenes with agronomic value, such as greater mass, oil content, and disease resistance. However, the information regarding anatomical events that control their growth maturation is surprisingly scarce. The aim of present work was to study male female sporogenesis gametogenesis, well cell division enlargement tissue differentiation in ovary embryo, linking timing these two frequently used phenological scales...

Abstract Hybridisation between crops and their wild relatives may promote the evolution of weeds. Seed germination dormancy are earliest life‐history traits highly influenced by maternal parent. However, ecological role effect on seed in crop–wild hybrids has received little attention. In this study, we test relative importance hybridisation effects first generation sunflower ( Helianthus annuus ). was tested two populations with contrasting dormancy, cultivated materials reciprocal crosses...

Prosopis chilensis (Mol.) Stuntz (Algarrobo de Chile) is an important native tree species that can be grown in arid and semiarid regions for wood forage production environmental protection. Developing a simple reliable vitro protocol cloning it would enable to improve genetically. Explants of P. were taken from 4 months-old plants the greenhouse or adult trees natural environment. Nodal segments 1-2 cm long containing axillary bud selected elongating shoots. These cuttings aseptically...

Agricultural expansion requires the deployment of stress-tolerant crops like safflower (Carthamus tinctorius L.). In breeding, oil improvement in early generations indirect selection through simply inherited traits. The quality is mostly related to fatty acid profile, which determined by OL locus. aim this research was identify simple easy-to-measure traits that indirectly explain content variation and its interaction with yield components, also generate an effective tool for genotyping A...

Sunflower (Helianthus annuus L.) can often display seed dormancy, which causes a delay for immediate sowing. The final degree of “whole seed” dormancy is determined by the contributions tissues that comprise it, such as, embryo, coat, and (or) pericarp. sunflower be reduced during after-ripening removing constraints. Our objective was to study how conditions storage removal pericarp affect level in line A-3. Also we provide insight on basis morphological characteristics A-3 pericarp-imposed...

Abstract Removal of the hull (pericarp) in sunflower ( Helianthus annuus L.) reduces fibre and increases protein seed meals. Thus, high hullability (H), ease with which pericarp is mechanically separated from (kernel) desirable. This study assessed how different hybrids, field environments canopy shading modified fruit H, that was related to morphology, anatomical structure chemical composition pericarps three oil‐producing hybrids share a common female parent (Monsanto®, Argentina):...

Abstract Safflower ( Carthamus tinctorius L.) has unrealized potential as an alternative crop in many semiarid regions including central Argentina. Our objective was to relate how temperature and precipitation conditions with fall (5 June 2012 23 Apr. 2013) winter sowing (13 Aug. 20 affected phenology, yield, yield components, oil percent four eight spring‐type safflower accessions the region of Fall associated lower temperatures, higher precipitation, heat/moisture stress indices deficits...

The most important economic activity on the Caldenal rangelands in central Argentina is cattle raising cow-calf operations. It known that grasses are bulk of diets and a previous study provided detailed information epidermal structures grass species region. objective this work was elaboration key to facilitate microhistological analysis esophageal, fecal, ruminal samples. allows for identification eleven perennial from characteristics blades, sheaths, stems. relevant illustrated each...

Temperate deciduous fruit trees survive winter temperatures by entering a dormant phase in their aerial meristematic organs. Release from bud dormancy occurs after chill requirements (CR) have been satisfied, whereas burst/flowering follows heat requirement (HR) fulfillment. The physiological basis behind these metrics remains elusive. In this study, we are presenting the first multidisciplinary progression analysis northern Patagonia, linking (1) forcing/field phenology, (2) anatomical...

Abstract The seed coat is a multifunctional tissue that plays an important role in dormancy and germination of sunflower seeds. In addition, abscisic acid (ABA) gibberellins (GAs) are the primary phytohormones antagonistically regulate dormancy, although other such as auxins (AUX) Jasmonates (JAs) also play critical modulation these processes. Here, we investigated imposition release dormancy. We evaluated endogenous level ABA, jasmonic (JA) indol-3-acetic (IAA) dry imbibed coats two inbred...