Irradiated seeds of Phaseolus vulgaris cv. Rajmah using Synchrotron X Ray Beam (BL-07) in RRCAT, Indore at doses of 1, 10 and 20 Gy were used to raise the seedling and the effects on growth and biochemical constituent...Irradiated seeds of Phaseolus vulgaris cv. Rajmah using Synchrotron X Ray Beam (BL-07) in RRCAT, Indore at doses of 1, 10 and 20 Gy were used to raise the seedling and the effects on growth and biochemical constituents in 4 - 8 days, old seedlings were analyzed. The seed irradiation effect on seedling development up to about 4 - 5 days, % germination, seedling length and seedling vigor are significantly decreased at 10 and 20 Gy doses with strong -ve correlation. Other parameters, like relative water content, electrical conductivity and acid phosphatase activity are also decreased. Decrease in various biochemical constituents, like, protein and proline has shown significant reduction at 10 and 20 Gy and phenol at 1 - 20 Gy. However, peroxidase activity is increased at 1 and 10 Gy. Amongst the antioxidant enzymes, only superoxide dismutase activity has shown significant increase at 10 and 20 Gy. For seed irradiation (1 and 10 Gy) effect on seedling development up to 8 days involving transfer to hydroponic culture after 4 days, in shoot tissue, decrease in nitrate reductase activity and pigment content is observed, while nitrate reductase activity in root tissue is increased. The results demonstrate adverse effects on growth as well as biochemical constituents along with increased antioxidant effect in bean seedlings with irradiation of seeds at high dose of synchrotron X radiations. Also the nitrate assimilation and photosynthetic activity are reduced in shoot tissue with seed irradiation, however, increased nitrate reductase activity in roots suggests the involvement of NO signaling.展开更多
Twelve peptides, including eight conservative amino acid residues in the amino acid sequence of hydrophilic S helix of the alternative oxidase (AOX), were synthesized by solid-phase method. The polypeptide was coupled...Twelve peptides, including eight conservative amino acid residues in the amino acid sequence of hydrophilic S helix of the alternative oxidase (AOX), were synthesized by solid-phase method. The polypeptide was coupled with α-chymotrypsinogen, and the antibodies were obtained through immunizing domestic rabbit by injecting this complex. By using these antibodies, which were raised to immunoreact with total proteins of purified mitochondria from different organs of mung bean seedlings, we find that there are two hybridizable AOX bands in mitochondria. Their molecular weights are about 35 and 38 ku, respectively. Moreover, the respiratory parameters of hypocotyl, true leaf and cotyledon of mung bean seedlings show that true leaf has the highest total respiration (Vt), alternative pathway (AP) capacity (Valt) and the activity of AP (ρValt) among the three organs. Vt and ρValt of cotyledon ranked the second. Hypocotyl has the lowest V, and ρValt, but its Valt is higher than that of cotyledon. These results are consistent with the analysis of Western blotting of expression of AOX. The highest Vt and ρValt in true leaf are accompanied two hybridizable polypeptides of AOX protein, 35 ku and 38 ku respectively. The next is cotyledon Vt and ρValt with only one 38 ku hybridizable polypeptide of AOX protein. Hypocotyl Vt and ρValt is the lowest and its immunoblotting band is similar to that of cotyledon, but the expressive amount of 38 ku protein is less than that of cotyledon. The results suggest that the 35 ku AOX may contribute mainly to true leaf ρValt.展开更多
Twelve peptides, including eight conservative amino acid residues in the amino acid sequence of hydrophilic S helix of the alternative oxidase (AOX), were synthesized by solid_phase method. The polypeptide was coupled...Twelve peptides, including eight conservative amino acid residues in the amino acid sequence of hydrophilic S helix of the alternative oxidase (AOX), were synthesized by solid_phase method. The polypeptide was coupled to α chymotrypsinogen, and the antibodies against this complex were obtained in rabbit. By using these antibodies, which were raised to immunoreact with total proteins of purified mitochondria from different organs of mung bean (Phaseolous radiatus L.) seedlings, it was found that there were two hybridizable AOX fractions in the mitochondria of mung bean seedlings. Their molecular weight was about 35 kD and 38 kD, respectively. Moreover, among the respiratory parameters obtained in hypocotyl, true leaf and cotyledon of mung bean seedlings true leaf had the highest total respiration ( V t ), alternative pathway (AP) capacity( V alt ) and the activity of AP (ρ V alt ). Hypocotyl V t and ρ V alt were the lowest, but its V t was higher than that of the cotyledon. The activities of total and cyanide_resistant respiration were consistant with the analysis of Western blotting of AOX expression. The highest V t and ρ V alt in true leaf were accompanied by two hybridizable polypeptides of AOX protein. The next was cotyledon V t and ρ V alt with only one 38 kD hybridizable polypeptide of AOX protein. Hypocotyl V t and ρ V alt were the lowest and its immunobloting band was similar to that of the cotyledon, but the expression amount of 38 kD protein was less than that of the cotyledon. The 35 kD AOX may make the main contribution to the true leaf ρ V alt .展开更多
文摘Irradiated seeds of Phaseolus vulgaris cv. Rajmah using Synchrotron X Ray Beam (BL-07) in RRCAT, Indore at doses of 1, 10 and 20 Gy were used to raise the seedling and the effects on growth and biochemical constituents in 4 - 8 days, old seedlings were analyzed. The seed irradiation effect on seedling development up to about 4 - 5 days, % germination, seedling length and seedling vigor are significantly decreased at 10 and 20 Gy doses with strong -ve correlation. Other parameters, like relative water content, electrical conductivity and acid phosphatase activity are also decreased. Decrease in various biochemical constituents, like, protein and proline has shown significant reduction at 10 and 20 Gy and phenol at 1 - 20 Gy. However, peroxidase activity is increased at 1 and 10 Gy. Amongst the antioxidant enzymes, only superoxide dismutase activity has shown significant increase at 10 and 20 Gy. For seed irradiation (1 and 10 Gy) effect on seedling development up to 8 days involving transfer to hydroponic culture after 4 days, in shoot tissue, decrease in nitrate reductase activity and pigment content is observed, while nitrate reductase activity in root tissue is increased. The results demonstrate adverse effects on growth as well as biochemical constituents along with increased antioxidant effect in bean seedlings with irradiation of seeds at high dose of synchrotron X radiations. Also the nitrate assimilation and photosynthetic activity are reduced in shoot tissue with seed irradiation, however, increased nitrate reductase activity in roots suggests the involvement of NO signaling.
基金the National Natural Science Foundation of China (Grant No. 39670070).
文摘Twelve peptides, including eight conservative amino acid residues in the amino acid sequence of hydrophilic S helix of the alternative oxidase (AOX), were synthesized by solid-phase method. The polypeptide was coupled with α-chymotrypsinogen, and the antibodies were obtained through immunizing domestic rabbit by injecting this complex. By using these antibodies, which were raised to immunoreact with total proteins of purified mitochondria from different organs of mung bean seedlings, we find that there are two hybridizable AOX bands in mitochondria. Their molecular weights are about 35 and 38 ku, respectively. Moreover, the respiratory parameters of hypocotyl, true leaf and cotyledon of mung bean seedlings show that true leaf has the highest total respiration (Vt), alternative pathway (AP) capacity (Valt) and the activity of AP (ρValt) among the three organs. Vt and ρValt of cotyledon ranked the second. Hypocotyl has the lowest V, and ρValt, but its Valt is higher than that of cotyledon. These results are consistent with the analysis of Western blotting of expression of AOX. The highest Vt and ρValt in true leaf are accompanied two hybridizable polypeptides of AOX protein, 35 ku and 38 ku respectively. The next is cotyledon Vt and ρValt with only one 38 ku hybridizable polypeptide of AOX protein. Hypocotyl Vt and ρValt is the lowest and its immunoblotting band is similar to that of cotyledon, but the expressive amount of 38 ku protein is less than that of cotyledon. The results suggest that the 35 ku AOX may contribute mainly to true leaf ρValt.
文摘Twelve peptides, including eight conservative amino acid residues in the amino acid sequence of hydrophilic S helix of the alternative oxidase (AOX), were synthesized by solid_phase method. The polypeptide was coupled to α chymotrypsinogen, and the antibodies against this complex were obtained in rabbit. By using these antibodies, which were raised to immunoreact with total proteins of purified mitochondria from different organs of mung bean (Phaseolous radiatus L.) seedlings, it was found that there were two hybridizable AOX fractions in the mitochondria of mung bean seedlings. Their molecular weight was about 35 kD and 38 kD, respectively. Moreover, among the respiratory parameters obtained in hypocotyl, true leaf and cotyledon of mung bean seedlings true leaf had the highest total respiration ( V t ), alternative pathway (AP) capacity( V alt ) and the activity of AP (ρ V alt ). Hypocotyl V t and ρ V alt were the lowest, but its V t was higher than that of the cotyledon. The activities of total and cyanide_resistant respiration were consistant with the analysis of Western blotting of AOX expression. The highest V t and ρ V alt in true leaf were accompanied by two hybridizable polypeptides of AOX protein. The next was cotyledon V t and ρ V alt with only one 38 kD hybridizable polypeptide of AOX protein. Hypocotyl V t and ρ V alt were the lowest and its immunobloting band was similar to that of the cotyledon, but the expression amount of 38 kD protein was less than that of the cotyledon. The 35 kD AOX may make the main contribution to the true leaf ρ V alt .
