| 接种含ACC脱氨酶的假单胞菌能部分缓解干旱胁迫对豌豆生长、产量及成熟的影响 |
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| 作者姓名： | M. ARSHAD B. SHAHAROONA T. MAHMOOD |
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| 作者单位： | [1]Institut de la Recherche Agronomique pour le Ddveloppement, P.O. Box 2067, Yaoundd （Cameroon）. [2]International Institute of Tropical Agriculture, Humid Forest Ecoregional Center, P.O. Box 2067, Yaoundd （Cameroon） [3]Tropical Soil Biology and Fertility, P.O. Box 30667, Nairobi （Kenya） |
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| 基金项目： | *1the Higher Education Commission, Islamabad, Pakistan (No.PIN 041 211534 A-031). |
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| 摘 要： | Two preselected plant growth promoting rhizobacteria （PGPR） containing 1-aminocyclopropane-1-carboxylate （ACC）- deaminase （EC 4.1.99.4） were used to investigate their potential to ameliorate the effects of drought stress on growth, yield, and ripening of pea （Pisum sativum L.）. Inoculated and uninoculated （control） seeds of pea cultivar 2000 were sown in pots （four seeds pot-1） and placed in a wire house. The plants were exposed to drought stress at different stages of growth （vegetative, flowering, and pod formation） by skipping the respective irrigation. Results revealed that inoculation of peas with PGPR containing ACC-deaminase significantly decreased the ＂drought stress imposed effects＂ on the growth and yield of peas. Exposure of plants to drought stress at vegetative growth stage significantly decreased shoot growth by 41% in the case of uninoculated plants, whereas, by only 18% in the case of inoculated plants compared to nonstressed uninoculated control.
Grain yield was decreased when plants were exposed to drought stress at the flowering and pod formation stage, but inoculation resulted in better grain yield （up to 62% and 40% higher, respectively） than the respective uninoculated nonstressed control. Ripening of pods was also delayed in plants inoculated with PGPR, which may imply decreased endogenous ethylene production in inoculated plants. This premise is further supported by the observation that inoculation with PGPR reduced the intensity of classical ＂triple＂ response in etiolated pea seedlings, caused by externally applied ACC. It is very probable that the drought stress induced inhibitory effects of ethylene could be partially or completely eliminated by inoculation with PGPR containing ACC-deaminase.
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| 关 键 词： | ACC-脱氨基酶 干旱 碗豆 植物生长 成熟 |
Inoculation with Pseudomonas spp.containing ACC-deaminase partially eliminates the effects of drought stress on growth, yield, and ripening of pea(Pisum sativum L.) |
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| M. ARSHAD,B. SHAHAROONA,T. MAHMOOD.Inoculation with Pseudomonas spp.containing ACC-deaminase partially eliminates the effects of drought stress on growth, yield, and ripening of pea(Pisum sativum L.)[J].Pedosphere,2008,18(5):611-620. |
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| Authors: | M ARSHAD B SHAHAROONA and T MAHMOOD |
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| Institution: | Institute of Soil&Environmental Sciences, University of Agriculture, Faisalabad-38040 (Pakistan). E-mail: bio@fsd.comsats.net.pk;Institute of Soil&Environmental Sciences, University of Agriculture, Faisalabad-38040 (Pakistan). E-mail: bio@fsd.comsats.net.pk;Department of Agronomy, University of Arid Agriculture, Rawalpindi (Pakistan) |
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| Abstract: | A large array of soil properties influences plant growth response to phosphorus (P) fertilizer input in acid soils.We carried out a pot experiment using three contrasted acid soils from southern Cameroon with the following main objectives:i) to assess the main soil causal factors of different maize (Zea mays L.) growth response to applied P and ii) to statistically model soil quality variation across soil types as well as their relationships to dry matter production.The soils used are classified as Typic Kandiudox (TKO),Rhodic Kandiudult (RKU),and Typic Kandiudult (TKU).Analysis of variance,regression,and principal component analyses were used for data analysis and interpretation.Shoot dry matter yield (DMY) was significantly affected by soil type and P rate with no significant interaction.Predicted maximum attainable DMY was lowest in the TKO (26.2 g pot-1) as compared to 35.6 and 36.7 g pot-1 for the RKU and TKU,respectively.Properties that positively influenced DMY were the levels of inorganic NaHCO3-extractable P,individual basic cations (Ca,Mg,and K),and pH.Their effects contrasted with those of exchangeable A1 and C/N ratio,which significantly depressed DMY.Principal component analysis yielded similar results,identifying 4 orthogonal components,which accounted for 84.7% of the total system variance (TSV).Principal component 1 was identified as soil nutrient deficiency explaining 35.9% of TSV.This soil quality varied significantly among the studied soils,emerging as the only soil quality which significantly (P < 0.05) correlated with maize growth.The 2nd,3rd,and 4th components were identified as soil organic matter contents,texture,and HCl-extractable P,respectively. |
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| Keywords: | acid soil maize growth P supply principal component analysis soil quality |
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