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Australian Journal of Plant Physiology
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1339
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#1Corinne AudranH-Index: 12
Last. Annie Marion-PollH-Index: 33
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Abscisic acid (ABA) is involved in seed development and plant adaptation to environmental stresses. ABA is synthesized from cleaved xanthophylls and zeaxanthin epoxidase (ZEP) is the enzyme responsible for the conversion of zeaxanthin to violaxanthin. In this study, we have characterized the ABA1 gene (AtZEP) of Arabidopsis thaliana L. and show that this complements the aba1 mutant, defective in zeaxanthin epoxidation. The molecular basis for two aba1 mutant alleles has been determined and the r...
60 CitationsSource
This study investigates the response to elevated CO2 partial pressure (pCO2) of C4grasses belonging to different biochemical subtypes (NAD–ME and NADP–ME), and taxonomic groups (main Chloroid assemblage, Paniceae and Andropogoneae). Seventeen C4 grasses were grown under well-watered conditions in two glasshouses maintained at an average dailyppCO2 of 42 (ambient) or 68 (elevated) Pa. Elevated pCO2 significantly increased plant water-use efficiency (WUE; dry matter gain per unit water transpired)...
39 CitationsSource
#1Musrur RahmanH-Index: 1
#2Anil GroverH-Index: 34
Last. M. H. EllisH-Index: 24
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A transgenic approach was taken to manipulate the levels of pyruvate decarboxylase (PDC) and alcohol dehydrogenase (ADH) in rice, in order to investigate whether alteration of ethanol fermentation can affect anaerobic tolerance. A line transformed with an antisense Adh1 construct had only 4–8% of the ADH activity of untransformed plants. This line showed reduced ethanol production and coleoptile growth under anoxia. Mature plants had reduced survival when submerged in water and exposed to anoxia...
68 CitationsSource
We examined the changes in leaf anatomy and some physiological characteristics during leaf expansion and maturation. Three deciduous tree species having different types of shoot phenology, maple (Acer mono Maxim.; 'flush' type), alder (Alnus japonica (Thunb.) Steud.; 'successive' type), and Japanese poplar (Populus maximowiczii A. Henry; 'successive' type), were studied. Leaf CO2 assimilation rate at high irradiance (Pmax) and CO2 transfer conductance inside the leaf (gi) varied significantly wi...
62 CitationsSource
We investigated the distribution of aluminium (Al) in the root tips of the Al-tolerant forage legume,Lotus pedunculatus Cav., a species that also accumulates condensed tannin (proanthocyanidin) in the roots and leaves. Clonal cuttings were grown in low ionic-strength nutrient solutions containing Al at levels that were either stimulatory or inhibitory (5–60µM ). The X-ray microanalysis of treated root apices revealed Al deposits at all Al concentrations. In freeze-fractured root samples from hig...
18 CitationsSource
The effects of cold-induced photoinhibition on chlorophyll and carotenoid dynamics and xanthophyll cycling in Eucalyptus nitens (Deane and Maiden) Maiden were assessed between planting and 32 weeks after planting. The seedlings were fertilised or nutrient-deprived (non-fertilised) before planting and shaded or not shaded after planting. The experimental site was 700 m a.s.l., which is considered marginal for establishment of E. nitens plantations in Tasmania due to low mean annual minimum temper...
34 CitationsSource
The growth reduction of wheat (Triticum aestivum L.) during and after waterlogging stress depends on the depth of water from the soil surface. In a pot experiment with 3-week-old plants, soil was waterlogged for 14 d at the surface, or at 100 or 200 mm below the surface, and pots were then drained to assess recovery. A fully drained treatment kept at field capacity served as control. During waterlogging, the relative growth rate of roots decreased more than that of shoots (by 6-27% for shoots, b...
107 CitationsSource
#1Hamid Reza Ghasempour (Razi University)H-Index: 5
#2Esther M. AndersonH-Index: 1
Last. Donald F GaffH-Index: 14
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Hydrated leaves of the resurrection grass Sporobolus stapfianus Gandoger are not desiccation tolerant, but moderate to severe drought stress can induce their desiccation tolerance while the leaves remain attached to drying intact plants. Free-cell suspensions prepared from fully turgid leaves of S. stapfianus were also found to be desiccation-sensitive. In this study a sensitive assay was developed to determine the effect of exogenous substances on the protoplasmic drought tolerance (PDT) of cel...
25 CitationsSource
Stable carbon and nitrogen isotope signatures (delta C-13 and delta N-15) of Cannabis sativa were assessed for their usefulness to trace seized Cannabis leaves to the country of origin and to source crops by determining how isotope signatures relate to plant growth conditions. The isotopic composition of Cannabis examined here covered nearly the entire range of values reported for terrestrial C-3 plants. The delta C-13 values of Cannabis from Australia, Papua New Guinea and Thailand ranged from ...
36 CitationsSource
#1Craig C. WoodH-Index: 4
#2Nazrul IslamH-Index: 23
Last. Ivan R. KennedyH-Index: 35
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Detailed studies in field experiments have shown repeatedly that the transfer of 15 N 2 fixed by diazotrophic bacteria to wheat tissue is minimal. Here, a simple and convenient laboratory co-culture model was designed to assess important features of the association between Azospirillum brasilense and wheat, such as the rate of nitrogen fixation (acetylene reduction), ammonia excretion from the bacterium and the transfer of newly fixed 15 N 2 from the associative diazotroph to the shoot tissue of...
23 CitationsSource
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