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A causal relationship between increased proline synthesis and plant tolerance of hyperosmotic stresses has been demonstrated. Nonetheless, the molecular basis of this effect is not yet established. Proline accumulation appears to be mediated by both ABA-dependent and ABA-independent signalling...
Two lentil ( Lens culinaris ) cultivars, Syrian Local Large (SLL) and PANT-L-406 (PL), have been used to study the genetics of the raffinose family of oligosaccharides (RFO) and a related compound, ciceritol, which is a galactosyl cyclitol. The RFO and ciceritol are the major soluble...
Tolerance to low temperature and paraquat-mediated oxidative stress was investigated in two Zea mays genotypes, VA36 and A619, grown at 25/22 °C and 16/14 °C for 50 d after germination. VA36, the tolerant genotype, showed an enhanced resistance to paraquat as compared to A619, the sensitive...
Transgenic potato tubers that overexpressed either a cytosolic or an apoplastic invertase in the wild type or AGPase antisense background were used to analyse the effect of invertase activity on cell expansion, starch granule formation and turgor pressure during tuber development. Although the...
The changes in photosynthetic activity and composition of pigments induced by changes in temperature were examined in the third leaf of three chilling-tolerant and three chilling-sensitive genotypes of maize ( Zea mays L.). The plants were grown under a controlled environment at a photon flux...
The dominating mechanism of K + uniport through the plasmalemma of Coscinodiscus wailesii has been studied in some detail as part of a general study of ionic relations in marine diatoms. Electrical measurements with double-barrelled glass-microelectrodes have been made in intact cells (diameter...
A cDNA clone encoding a novel 2-oxoacid-dependent dioxygenase which is up-regulated during the early phases of adventitious root formation in Malus domestica 'Jork 9' has been isolated. The corresponding gene has been designated ARRO-1 (Adventitious Rooting Related Oxygenase) and is represented...
Double-barrelled micropipettes have been used to record the endogenous electrical behaviour of the marine diatom Coscinodiscus wailesii , diameter about 250 ॖm, surface area about 0.2 mm 2 . The conclusion is that the membrane is not in a genuine steady-state but rather the membrane changes...
To evaluate the contribution of transcellular, apoplastic and symplastic pathways to water movements, horizontal (axial pathway) and vertical (radial pathway) sugar beet root ( Beta vulgaris L.) slices were studied. Volume flows ( J v ) were measured under hydrostatic and/or osmotic gradients,...
Four South African Leucadendron congenerics with divergent soil N and P preferences were grown as juveniles at contrasting nutrient concentrations at ambient (350 ॖmol mol -1 ) and elevated (700 ॖmol mol -1 ) atmospheric CO 2 levels. Photosynthetic parameters were related to leaf nutrient and...
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