Laboratory studies of insecticide efficacy and resistance in Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) populations from British Columbia,Canada          下载免费PDF全文

Michael J Smirle  Cheryl L Zurowski  Murali‐Mohan Ayyanath  Ian M Scott  Kenna E MacKenzie 《Pest management science》2017,73(1):130-137

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Development of a novel ex vivo equine corneal model          下载免费PDF全文

Todd L. Marlo  Elizabeth A. Giuliano  Ajay Sharma  Rajiv R. Mohan 《Veterinary ophthalmology》2017,20(4):288-293

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Baseline sensitivity of lepidopteran corn pests in India to Cry1Ab insecticidal protein of Bacillus thuringiensis     

Sushil K Jalali  Yadavalli Lalitha  Subray P Kamath  Komarlingam S Mohan  Graham P Head 《Pest management science》2010,66(8):809-815

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Identification of quantitative trait loci associated with resistance to foliar diseases in sorghum [<Emphasis Type="Italic">Sorghum bicolor</Emphasis> (L.) Moench]     

S. Murali Mohan  R. Madhusudhana  K. Mathur  D. V. N. Chakravarthi  Sanjay Rathore  R. Nagaraja Reddy  K. Satish  G. Srinivas  N. Sarada Mani  N. Seetharama 《Euphytica》2010,176(2):199-211

Forage sorghum cultivars grown in India are susceptible to various foliar diseases, of which anthracnose, rust, zonate leaf spot, drechslera leaf blight and target leaf spot cause severe damage. We report here the quantitative trait loci (QTLs) conferring resistance to these foliar diseases. QTL analysis was undertaken using 168 F₇ recombinant inbred lines (RILs) of a cross between a female parental line 296B (resistant) and a germplasm accession IS18551 (susceptible). RILs and parents were evaluated in replicated field trials in two environments. A total of twelve QTLs for five foliar diseases on three sorghum linkage groups (SBI-03, SBI-04 and SBI-06) were detected, accounting for 6.9–44.9% phenotypic variance. The morphological marker Plant color (Plcor) was associated with most of the QTL across years and locations. The QTL information generated in this study will aid in the transfer of foliar disease resistance into elite susceptible sorghum breeding lines through marker-assisted selection.  相似文献   

Temporal changes in endogenous estrogens and expression of behaviors associated with estrus during the periovulaory period in Murrah buffaloes (<Emphasis Type="Italic">Bubalus bubalis</Emphasis>)     

Krishna Mohan  Vijay Kumar  Mihir Sarkar  B. S. Prakash 《Tropical animal health and production》2010,42(1):21-26

The objective of this study were (1) to establish the duration of behavioral estrus signs and timing of ovulation in Murrah buffaloes (n = 10) and (2) to determine relationship between behavioral estrus signs with change in plasma estrogen concentrations. Estrus and its behavioral signs were detected at hourly intervals by visual observations, per recta examination of genitalia and bull parading four times in a day for 30 minutes each. Among the behavioral signs of estrus, swollen vulva (80%) was the best indicator of estrus followed by excitement (70%). Among the duration of behavioral estrus signs the first and longest duration of estrus signs was swollen vulva which was seen upto 19.8 ± 0.8 h after onset of estrus. The mean total duration of estrus symptoms from appearance to disappearance of all the behavioral estrus symptoms was 23.5 ± 1.7 h. All the behavioral estrus symptoms were observed during the period of estrogen surge. Endocrine profile during the periestrus period showed that the mean peak concentrations of total estrogen 23.9 ± 3.9 pg/ml occurred at 8.8 ± 1.7 h after onset of estrus. The average number of estrus symptoms observed per animal during onset of spontaneous estrus was 5.7. Ovulation occurred after 37.4 ± 1.7 h after onset of estrus and 13.4 ± 1.0 h after end of total estrogen surge respectively. In conclusion, our results suggest that all signs of behavioral estrus occurred during the preovulatory rise in estrogens. The first sign of estrus to be observed was a swollen vulva and this symptom persisted the longest.  相似文献   

Modulation of manganese toxicity in Pisum sativum L. seedlings by kinetin     

Savita Gangwar  Vijay Pratap Singh  Sheo Mohan Prasad  Jagat Narayan Maurya 《Scientia Horticulturae》2010

In the present study, the effects of kinetin (KN; 10 and 100 μM) application under manganese toxicity (Mn; 50, 100 and 250 μM) were investigated, on growth, photosynthetic pigments, total protein, total nitrogen, ammonium (NH₄⁺) content, NH₄⁺ assimilating enzymes and antioxidant system in pea seedlings. The exposure of pea seedlings to Mn and 100 μM of KN alone and in combination, caused decrease in growth, photosynthetic pigments, total protein and total nitrogen contents, and an increase in NH₄⁺ content. However, application of 10 μM of KN together with Mn reduced the Mn toxicity symptoms, promoted the growth of seedlings and led to the decrease in NH₄⁺ content compared to Mn treatments alone. The root and shoot activities of glutamine synthetase (GS), glutamate oxoglutarate aminotransferase (GOGAT) and catalase (CAT) were decreased while glutathione reductase (GR) and dehydroascorbate reductase (DHAR) activities exhibited differential responses when pea seedlings were exposed to Mn and 100 μM of KN. However, under similar treatments, activities of glutamate dehydrogenase (GDH), superoxide dismutase (SOD) and ascorbate peroxidase (APX) in root and shoot were increased. It was noticed that addition of 10 μM of KN together with Mn, caused significant stimulation in activities of enzymes of NH₄⁺ assimilation and antioxidant defense system even over their respective control values. Non-enzymatic antioxidants (ascorbate and glutathione) in root and shoot of pea seedlings exposed to Mn stress were significantly increased by the addition of 10 μM of KN. Therefore, ameliorative effect of 10 μM of KN against Mn toxicity was observed. This study thus suggests that 10 μM of KN appreciably improves Mn tolerance of pea seedlings under Mn toxicity while reverse effects were exhibited by 100 μM of KN.  相似文献   

Role of mealy bug on sheath rot disease manifestation in rice plants     

P. Lakshmanan  T. Manoharan  S. Mohan 《国际虫害防治杂志》2013,59(3):356-357

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Temporal changes in circulating levels of plasma interleukin-8 during peripartum period in Murrah buffaloes (Bubalus bubalis) under subtropical climate     

Kumar V  Kumar P  Mohan K  Sarkar M  Suresh KP  Chauhan MS  Prakash BS 《Tropical animal health and production》2011,43(3):669-674

The objective of this study was to elucidate the changes in circulating levels of plasma interleukin-8 (IL-8) during peripartum period in Murrah buffaloes (Bubalus bubalis). IL-8 was estimated in blood plasma of healthy peripartum Murrah buffaloes (n = 6) on days ±30, ±15, ±5, ±3, ±1 and 0 pre- and postpartum with respect to the day of parturition (day 0) in each of the two different seasons (hot–humid and spring). The mean microclimate Temperature–Humidity Index (THI) during spring season was significantly lower (p < 0.01) than the corresponding THI in hot–humid season. In both the seasons, plasma IL-8 remained lower in prepartum period (≤46.56 ± 14.08 pg/ml during spring and ≤ 73.18 ± 18.56 pg/ml during hot–humid season) than in the postpartum period (≥51.41 ± 13.82 pg/ml during spring and ≥ 84.13 ± 16.97 pg/ml in hot humid season). During spring, the IL-8 levels were significantly higher (P < 0.05) on days +5 and +15 postpartum in comparison to the IL-8 levels on days −30, −5, and −3 prepartum. During hot–humid season, IL-8 level was significantly higher (P < 0.05) on day +30 as compared to the IL-8 levels on days −30 and −5 prepartum. The correlation between IL-8 and mean microclimate THI was significant (r = 0.25, P < 0.01). From the results, it is concluded that peripartum period in buffaloes is associated with an inflammatory response leading to significantly higher plasma IL-8 during parturition and postpartum period than in the pre-partum period.  相似文献   

Influence of increasing doses of nitrogen and organic matter on nitrogen loss from sodium nitrate     

Madhuri Mohan Rai 《Soil Science and Plant Nutrition》2013,59(4):171-172

There is a general belief that most of the nitrogen contained in artificial nitrogenous fertilizers is utilized by the growing crops when applied to them. But unfortunately the Position is not so and the recovery of nitrogen from artificial fertilizers remains only in the neighbourhood of 50%. Indeed, the loss of nitrogen from artificial fertilizers is often even more than 50% as indicated by the following observations of RUSSELL (1) : “Crops that respond to nitrogen manuring commonly take up and fix in their tissues between one-third and one-half of the nitrogen added as sulphate of ammonia and a rather high proportion of nitrogen added as nitrate, the remainder is lost .... though its fate has not been too well determined.”  相似文献   

矿山废弃地土壤基质改良研究   总被引：4，自引：2，他引：2  

赵默涵 《中国农学通报》2008,24(12):128-131

矿山废弃地对生态环境有着极大的破坏作用,危及人类的生存与健康,并影响到区域生态经济的可持续发展。矿山废弃地的生态修复和重建,已被看作是矿区土地修复的主要组成部分,而在生态恢复的植被重建过程中,基质改良是生态恢复的核心问题。研究借鉴目前国内外土壤基质改良的方法,较系统地介绍了矿山废弃地土壤基质物理、化学、生物改良技术措施。最后提出我国矿山废弃地土壤改良方法的选用原则：遵循因地制宜、就地取材,结合以往的研究成果,借鉴国际矿区土地复垦和生态修复的成功经验,研究废弃物土壤化演化的自然规律和机理,最终实现人工辅助的土壤化演化。  相似文献