Soil salinity badly affects agriculture productivity through accumulation of salts in upper layers of soils. The harmful effects of salts in arable lands have influenced modern as well as ancient civilizations. A pot ...Soil salinity badly affects agriculture productivity through accumulation of salts in upper layers of soils. The harmful effects of salts in arable lands have influenced modern as well as ancient civilizations. A pot study was carried out to test the performance of two PGPR isolates (KS 8, KS 28) on sunflower (SMH-0917) under different salinity levels (8, 10 and 12 dS·m-1). These salinity levels were developed by adding calculated amount of salts (NaCl, Na2SO4, CaCl2 and MgSO4) with ratio of 3:4:2:1. The bacterial strains KS 8 and KS 28 were applied separately in two treatments while third treatment was co-inoculation (KS mix). Completely randomized experimental design (CRD) was used and data were collected at flowering stage about pre-decided plant growth parameters (plant height, shoot dry weight and root dry weight). The bacterial isolate KS 8 showed an increase of 26, 102% and 83% in plant height, shoot dry weight and root dry weight at EC 8 dS·m-1, while this improvement was 67%, 163% and 296% at EC 10 dS·m-1, however an increase of 100%, 74% and 382% was recorded over control respectively at EC 12 dS·m-1. Similarly isolate KS 28 exhibited an increase of 14%, 69% and 54% in plant height;shoot dry weight and root dry weight at EC 8 dS·m-1, whereas this improvement was 56%, 163% and 188% at EC 10 dS·m-1, while an increase of 60%, 41% and 282% was registered respectively over control at EC 12 dS·m-1. The increase due to mixture treatments was 4%, 41% and 16% in plant height, shoot dry weight and root dry weight at EC 8 dS·m-1, while an increase of 33%, 57% and 100% at EC 10 dS·m-1, whereas an improvement of 53%, 33% and 164% respectively was noted at EC 12 dS·m-1 over un-inoculated. The isolate KS 8 performed better than KS 28 and mixture treatment. These two PGPR strains could be used to mitigate the adverse impact caused by salinity stress on sunflower.展开更多
Objective The 1-aminocyclopropanecarboxylic acid(ACPC) is a natural micromolecule non-protein amino acid that exists only in plants.Despite the determination of its regulating effects on plants,several bioactivities a...Objective The 1-aminocyclopropanecarboxylic acid(ACPC) is a natural micromolecule non-protein amino acid that exists only in plants.Despite the determination of its regulating effects on plants,several bioactivities and effects on animals or humans are still unclear.This review focuses the pharmaceutical effects,above all,the neuroprotective effects of ACPC on the cerebro-and cardiovascular system.Methods Two hundred and seventy nine studies were selected and identified from a total of 2457 references in Medline and Chemical Abstracts from 1957 to 2008.Only 38 articles on neuroprotective effects of ACPC from seven different countries qualified to be included in the analysis.Results ACPC has altogether following six general neuroprotective effects on the brain and nervous system:anti-neurotoxicity induced by NMDA,dynorphin-A,glutamate,and morphine;protection from cerebral neurological injury induced by ischemia;antidepressant and anxiolytic effects;anti-convulsion and-seizures and control of epilepsy;facilitation of spatial learning and memory;and the effect of reducing alcohol consumption.Conclusion ACPC has shown a variety of effects on plants and animals.The bioactivities and pharmaceutical effects on animals are of great significance to medical research and public health.Further clinical trials or epidemiological studies are needed to determine its effect in humans.Food intervention with ACPC-rich vegetables and fruits may be a suitable therapy for cerebro-and cardiovascular system diseases.Administration of trace exogenous ACPC could produce vegetables and fruits of rich endogenous ACPC.展开更多
文摘Soil salinity badly affects agriculture productivity through accumulation of salts in upper layers of soils. The harmful effects of salts in arable lands have influenced modern as well as ancient civilizations. A pot study was carried out to test the performance of two PGPR isolates (KS 8, KS 28) on sunflower (SMH-0917) under different salinity levels (8, 10 and 12 dS·m-1). These salinity levels were developed by adding calculated amount of salts (NaCl, Na2SO4, CaCl2 and MgSO4) with ratio of 3:4:2:1. The bacterial strains KS 8 and KS 28 were applied separately in two treatments while third treatment was co-inoculation (KS mix). Completely randomized experimental design (CRD) was used and data were collected at flowering stage about pre-decided plant growth parameters (plant height, shoot dry weight and root dry weight). The bacterial isolate KS 8 showed an increase of 26, 102% and 83% in plant height, shoot dry weight and root dry weight at EC 8 dS·m-1, while this improvement was 67%, 163% and 296% at EC 10 dS·m-1, however an increase of 100%, 74% and 382% was recorded over control respectively at EC 12 dS·m-1. Similarly isolate KS 28 exhibited an increase of 14%, 69% and 54% in plant height;shoot dry weight and root dry weight at EC 8 dS·m-1, whereas this improvement was 56%, 163% and 188% at EC 10 dS·m-1, while an increase of 60%, 41% and 282% was registered respectively over control at EC 12 dS·m-1. The increase due to mixture treatments was 4%, 41% and 16% in plant height, shoot dry weight and root dry weight at EC 8 dS·m-1, while an increase of 33%, 57% and 100% at EC 10 dS·m-1, whereas an improvement of 53%, 33% and 164% respectively was noted at EC 12 dS·m-1 over un-inoculated. The isolate KS 8 performed better than KS 28 and mixture treatment. These two PGPR strains could be used to mitigate the adverse impact caused by salinity stress on sunflower.
文摘Objective The 1-aminocyclopropanecarboxylic acid(ACPC) is a natural micromolecule non-protein amino acid that exists only in plants.Despite the determination of its regulating effects on plants,several bioactivities and effects on animals or humans are still unclear.This review focuses the pharmaceutical effects,above all,the neuroprotective effects of ACPC on the cerebro-and cardiovascular system.Methods Two hundred and seventy nine studies were selected and identified from a total of 2457 references in Medline and Chemical Abstracts from 1957 to 2008.Only 38 articles on neuroprotective effects of ACPC from seven different countries qualified to be included in the analysis.Results ACPC has altogether following six general neuroprotective effects on the brain and nervous system:anti-neurotoxicity induced by NMDA,dynorphin-A,glutamate,and morphine;protection from cerebral neurological injury induced by ischemia;antidepressant and anxiolytic effects;anti-convulsion and-seizures and control of epilepsy;facilitation of spatial learning and memory;and the effect of reducing alcohol consumption.Conclusion ACPC has shown a variety of effects on plants and animals.The bioactivities and pharmaceutical effects on animals are of great significance to medical research and public health.Further clinical trials or epidemiological studies are needed to determine its effect in humans.Food intervention with ACPC-rich vegetables and fruits may be a suitable therapy for cerebro-and cardiovascular system diseases.Administration of trace exogenous ACPC could produce vegetables and fruits of rich endogenous ACPC.
