http://localhost:80/xmlui/handle/123456789/14492 2026-04-23T09:34:45Z 2026-04-23T09:34:45Z AZIZ, IRFAN MAHMOOD, TARIQ ISLAM, KHANDAKAR RAFIQ http://localhost:80/xmlui/handle/123456789/14771 2022-12-06T07:28:34Z 2015-01-01T00:00:00Z

Title: IMPACT OF SOLE CROPPING AND MULTIPLE CROPPING ON SOIL HUMIFIED CARBON FRACTIONS Authors: AZIZ, IRFAN; MAHMOOD, TARIQ; ISLAM, KHANDAKAR RAFIQ Abstract: The present study was planned to improve our understanding how crop rotation can enhance humified C fractions. Along term experiment was conducted on Vanmeter farm of the Ohio State University South Centers at Piketon Ohio, USAfrom 2002 to 2007. Crop rotation treatments included were continuous corn (CC), corn-soybean (CS) and corn–soybeanwheat-cowpea (CSW) rotations. Randomized complete block design with 6 replications was used under natural fieldconditions. The findings of this long-term study revealed that multiple cropping had significantly improved humified carbonfractions compared to mono-cropping system. Although total humified carbon (THOC), sugar free humified carbon (HOC)concentration were non-significant however, humin (NH) contents, humic (HA), fulvic acids (FA), humic and fulvic acidassociated glucose (HA-NH and FA-NH) were significantly affected by various crop rotations within five years. The soilunder CC had 22-52% significantly greater NH concentration than CSW and CS rotations respectively. Similarly all croprotations had shown 5–16 increase in HA and 5-17% decreased in FA over time. Likewise soil under CC had 16 and 54% greater HA-NH concentration as compared to CSW and CS rotations. The FA-NH concentration increased significantly by27– 51% in soil under all treatments over time. The soil under CSW had greater HA/FA (1.6) fallowed by CC (1.4) and CS(1.1). Soils under CSW had significantly greater HA/HOC (12–18%) as compare to CC and CS respectively. Conversely, thevalue of FA/HOC decreased (1–23%) in soil under all crop rotation treatments within five years. Degree of humification(DH) had shown a significant increase (7–12%) in soil under all treatments as compared to 2002. Irrespective of croprotation THOC, HOC, NH, humin, HA, HR and FA/HOC concentration decreased significantly with increase in soil depth.While fulvic acid concentration HA/HOC in all crop rotation increased with increase in soil depth. The effect of croprotation on humified C fractions could be because of variations in type, amount and quality of C returned by different plantsinto the soil. So replacing mono-cropping with multiple cropping can enhance humified C fractions and can improve soilfunctional properties.

2015-01-01T00:00:00Z RADHAKRISHNAN, RAMALINGAM - JUNG LEE, IN http://localhost:80/xmlui/handle/123456789/14769 2022-12-06T07:19:14Z 2014-12-31T00:00:00Z

Title: ENDOGENOUS ANTIOXIDANTS AND PHYTOHORMONAL REGULATION INDUCED BY SPERMIDINE IMPROVE CUCUMBER PLANT GROWTH Authors: RADHAKRISHNAN, RAMALINGAM; - JUNG LEE, IN Abstract: Involvement of exogenously applied low dose of spermidine (Spd) on the regulation of endogenous chlorophylls,b reactive oxygen species (ROS), antioxidants, gibberellins (GAs), jasmonic acid (JA) and salicylic acid (SA) was investigated in cucumber plants. The plants were exposed to low concentrations of 0.06 and 0.3 μM Spd. The length of shoots, leaf area, fresh and dry weight of leaves was greater in Spd treatments than their controls. A remarkable increase of chlorophyll and protein content was noticed in plants treated with 0.3 μM Spd. However, superoxide content and lipid peroxidation were moderately declined and the activities of peroxidase, polyphenol oxidase and acid phosphatase were elevated in plants treated with 0.3 μM Spd. The plants treated with 0.06 μM Spd also showed the greater level of antioxidants over the untreated controls. A higher accumulation of non-13-hydroxylated and 13-hydroxylated GAs such as GA24, GA9, GA4, GA20, GA8 and GA7 was observed in Spd treated plants than their controls. Consequently, the concentration of JA and SA declined significantly in 0.3 μM Spd treated plants. These results suggest that exogenous application of 0.3 μM Spd increases plant growth through the enhancement of photosynthetic pigments, protein, enzyme activities and GAs, and reduction of ROS, JA and SA content and it could be useful to enhancement of crop plants cultivation.

2014-12-31T00:00:00Z JAVED, NAMRA ASHRAF, MUHAMMAD -AL-QURAINY, FAHAD AKRAM, NUDRAT AISHA http://localhost:80/xmlui/handle/123456789/14766 2022-12-06T07:13:59Z 2014-12-30T00:00:00Z

Title: INTEGRATION OF PHYSIO-BIOCHEMICAL PROCESSES AT DIFFERENT PHENOLOGICAL STAGES OF WHEAT (TRITICUM AESTIVUM L.) PLANTS IN RESPONSE TO HEAT STRESS Authors: JAVED, NAMRA; ASHRAF, MUHAMMAD; -AL-QURAINY, FAHAD; AKRAM, NUDRAT AISHA Abstract: A study was conducted to assess the influence of heat stress imposed at different growth stages of wheat (Triticum aestivum L.) plants. Four wheat cultivars namely S-24, Saher-2006, Lasani and AARI-10 were subjected to high temperature (HT) stress at tillering and booting phenological phases. Under stress conditions, root and shoot fresh weights, membrane thermostability (MTS) and non-photochemical quenching (NPQ) were significantly perturbed in all four wheat cultivars at both developmental stages. However, HT stress did not influence all the other attributes significantly including shoot fresh weight, chlorophyll a and b pigments, photosynthetic rate (A), leaf water (Ψw), internal CO2 (Ci), osmotic (Ψs) and turgor (Ψp) potentials, transpiration rate (E), water-use-efficiency (A/E), stomatal conductance (gs) as well as Fv/Fm ratio. Among all wheat cultivars, cv. Lasani performed better in shoot and root fresh weight, and chlorophyll a contents at the tillering stage, while in MTS at the booting phase, cv. S-24 in shoot fresh weight, E, and gs at the boot stage and highest MTS and WUE at the tillering stage. However, cv. AARI-10 performed well in root fresh weight, Ψw, Ψs, Ψp,,WUE and NPQ when stress was applied at the boot stage, while E and Fv/Fm in this cultivar on exposure to stress at the tillering stage. Cultivar Saher-2006 performed better in gs, leaf Ψs and Ψp at the tillering stage, while Fv/Fm was recorded better at the boot stage and A in the same cultivar at all growth stages. Overall, HT stress applied at different growth stages was only effective in altering root fresh weight, MTS and NPQ in all four wheat cultivars. Of all wheat cultivars, cv. AARI-10 performed better in growth and physiological attributes examined in the present study under HT stress applied at different phenological stages

2014-12-30T00:00:00Z NASIM, ADNAN FARHATULLAH, FARHATULLAH KHAN, NAQIB ULLAH M. AFZAL, M AZAM, SYED MUHAMMAD NASIM, ZEESHAN UL AMIN, NOOR http://localhost:80/xmlui/handle/123456789/14756 2022-12-06T07:08:33Z 2014-12-29T00:00:00Z

Title: COMBINING ABILITY AND HETEROSIS FOR YIELD AND YIELD CONTRIBUTING TRAITS IN BRASSICA RAPA (L.) SSP. DICHOTOMA (ROXB.) HANELT Authors: NASIM, ADNAN; FARHATULLAH, FARHATULLAH; KHAN, NAQIB ULLAH; M. AFZAL, M; AZAM, SYED MUHAMMAD; NASIM, ZEESHAN; UL AMIN, NOOR Abstract: Combining ability was studied for yield and yield contributing traits in 5 × 5 diallel cross in Brassica rapa (L.) ssp. dichotoma (Roxb.) Hanelt. Primary branches plant-1, pods main raceme-1, pod length, 100-seed weight and seed yield plant-1 were significantly different. Heritability and genetic advance estimates were moderate for primary branches plant1 , pods main raceme-1, 100 seed weight whereas were high for seed yield plant-1. Parental line G-909 for primary branches plant-1, pods main raceme-1 and seed yield plant-1, genotype G-902 for pod length and genotype G-403 for 100- seed weight were the best general combiners. Based on combing ability and heterosis, the F1 hybrids G-909 × G-265 (for primary branches plant-1), G-265 × G- 403, G-1500 × G-909 (for pods main raceme-1), G-403 × G-909 (for pod length), G-265 × G-1500 (for 100-seed weight) and G-1500 × G-902, G-909 × G-902 (for seed yield plant-1) can be utilized in future breeding endeavors. Non-additive genetic control, as predominant mechanism, for all the traits necessitates the use of schemes like bi-parental mating design, diallel selective mating followed by recurrent or reciprocal recurrent selection.

2014-12-29T00:00:00Z