Dry matter changes and ion partitioning in two near isogenic barley cultivars Maythorpe (relatively salt sensitive) and Golden Promise (relatively salt tolerant) were studied in response to ...increasing salinity. Although the growth of both cultivars was significantly reduced by exposure to NaCl, the effect was greater in Maythorpe, whilst Golden Promise maintained an increased ratio of young to old leaf blade. Golden Promise maintained significantly lower Na+ concentrations in young expanding tissues compared with Maythorpe. Partitioning of Cl- was evident in that both varieties maintained lower Cl- concentrations in mesophyll than in epidermal cells. Golden Promise maintained higher K+/Na+ and Ca2+/Na+ ratios in young leaf blade and young sheath tissues than Maythorpe when exposed to salt. Differences in ion partitioning and the maintenance of higher K+ and Ca2+ to Na+ ratios, especially in young growing and recently expanded tissues, would appear to be important mechanisms contributing to the improved salt tolerance of Golden Promise.
The development of commitment and satisfaction with sacrifice has been associated with relationship health and stability. Given the importance of early romantic relationships, the purpose of the ...present study was to explore how these constructs relate and develop in an emerging adult population (n = 246). Through an initial confirmatory factor analysis, we found the two constructs can be distinct. Then, using interdependence theory and a cross-lagged model over three time points, we found support for a bidirectional relationship between commitment and satisfaction with sacrifice. In addition, we found a main effect for relationship length and instability (i.e., cycling) on Time 1 and Time 3 dedication respectively.
A gene encoding the barley vacuolar ATPase subunit B (BSVAP) was differentially expressed between two near isogenic barley cultivars, Golden Promise and Maythorpe. This gene (BSVAP) was isolated by ...the mRNA differential display technique (DDRT‐PCR). BSVAP was salt inducible under long‐term salinity stress in the salt sensitive cultivar Maythorpe but less so in the relatively salt tolerant Golden Promise and was more highly expressed under control conditions in Maythorpe. The physiological consequences of altered vacuolar ATPase expression are discussed in relation to the salt sensitivity of Maythorpe.
The acridine half-mustard ICR-170-induced reversion of the mutant am15, which has a single base-pair deletion, at a frequency of between 9 and 28 X 10(-6). In each of three classes of revertants, the ...mutagen had induced the insertion of a -G- -C- base pair at a -G-G- -C-C- site. The mutant am6, which has a single base pair insertion, is known to be revertible, with UV light, by deletion of a -G- -C- base pair at a -G-G-G- -C-C-C- site. This mutant reverted with ICR-170 at a frequency of 0.1 X 10(-6). These results show that ICR-170 is able to induce addition frameshifts in Neurospora crassa within short, monotonous runs of G:C base pairs, but indicate a lack of deletion activity at such sequences.
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