As the plant hormone abscisic acid (ABA) is involved in responses to salinity stress. We tested its putative relationship with the degree of tolerance to this abiotic stress. For this purpose we examined the responses of sensitive (IR29) and tolerant (IR651) varieties of indica rice (Oryza sativa L.) to a range of salinity (0 (control) and 100 mM NaCl). Shoot and root dry weight was reduced and...

Water scarcity and the increasing severity of water deficit stress are major challenges to sustaining irrigated rice (Oryza sativa) production. Despite the technologies developed to reduce the water requirement, rice growth is seriously constrained under water deficit stress compared with other dryland cereals such as wheat (Triticum aestivum). We exposed rice cultivars with contrasting respons...

Glyphosate-tolerant cotton cultivars were evaluated for tolerance to Belonolaimus longicaudatus in field experiments conducted from 2004 to 2005. Field trials were arranged in a split-plot design that included treatment with four levels of 1, 3-dichloropropene (0.0, 13.9, 27.8, and 41.7 1 a.i./ha) to establish a range of population densities of B. longicaudatus. Six cotton cultivars (early-to-m...

Climate change increases the drought-affected areas, which challenge breeders to develop adaptive and drought-tolerant rice cultivars. The study aimed determine heritability, gene action controlling of various traits in upland F4 populations derived from cross, Sileso (high yielding drought tolerant) × Ciherang (early maturing), obtain high-yielding early-maturing lines. populations, along with...

Sweetpotato is an important food, feed and vegetable crop in Niger Nigeria. The adoption of a new variety depends on famers consumers preferences. objective this study was to identify sweetpotato preferred traits by end-users conducted two countries through participatory rural appraisal. results revealed that produced men Niger, while it mostly women South-East In 100% cultivated varieties were...

This study examined the changes of chlorophyll content and chloroplast ultrastructure in mesophyll cells of two rice (Oryza sativa L. spp. japonica) cultivars with different saline-alkali tolerance (Suijing NO.5: salinity-alkalinity-tolerant, and Songjing NO.6: salinityalkalinity-sensitive). Both rice cultivars were grown under three natural occurring saline-alkali conditions, as well as the no...

Soybean is one of the most important crops in Brazil and continuously generates demands for production technologies, such as cultivars resistant to diseases. In recent years, the Asian rust fungus (Phakopsora pachyrhizi Syd. & P. Syd 1914) has caused severe yield losses and the development of resistant cultivars is the best means of control. Understanding the genetic control and estimating para...