scholarly journals Impact of phopshate solubilizing bacteria (Bacillus polymixa) on drought tolerance of green gram [Vigna radiata (L.) Wilczek]

2016 ◽  
Vol 5 (04) ◽  
pp. 1318
Author(s):  
Vidya P. ◽  
Shintu V. P.* ◽  
Jayaram M. K.
Keyword(s):  
Drought Stress ◽  
Vigna Radiata ◽  
Biochemical Parameters ◽  
Soil Phosphorus ◽  
Phosphorus Uptake ◽  
Germination Percentage ◽  
Green Gram ◽  
Phosphate Solubilizing Bacteria ◽  
Root And Shoot Length ◽  
Physiological And Biochemical

The main focus of the present study is to evaluate the effect of priming of green gram (Vigna radiata) with phosphate solubilising bacteria (PSB) during drought stress. Drought is the major abiotic stress factor which diminishing the growth and development of agricultural in Kerala. So immediate steps need to be taken to overcome the adverse effect of drought stress for the development of agriculture. Phosphate Solubilizing Bacteria are one of the best microorganisms found to be simultaneously increasing the insoluble soil Phosphorus uptake by the plant and crop yield. In the study, the seeds of Vigna radiata were subjected to priming treatment with 0.5 % and 1% phosphate solubilising bacteria. Physiological and biochemical parameters like germination percentage, root and shoot length, relative water content (RWC), amount of chlorophyll, protein, proline and yield were studied.  Inoculation with phosphate solubilising bacteria showed remarkable variation in both physiological and biochemical parameters of green gram plants. Among the two concentrations tested, 1% phosphate solubilising bacteria was found to be effective in mitigating the effect of water stress, stimulating early flowering and also in increasing yield.

Morphological, Physiological and Biochemical Responses of Poplar Plants to Drought Stress

2018 ◽  
Vol 5 (03) ◽  
Author(s):  
ARADHNA KUMARI ◽  
IM KHAN ◽  
ANIL KUMAR SINGH ◽  
SANTOSH KUMAR SINGH
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Biochemical Parameters ◽  
Sugar Content ◽  
Soluble Sugar ◽  
Field Capacity ◽  
Drought Event ◽  
Total Biomass ◽  
Biochemical Responses ◽  
Physiological And Biochemical

Poplar clone Kranti was selected to assess the morphological, physiological and biochemical responses under drought at different levels of water stress, as it is a common clone used to be grown in Uttarakhand for making paper and plywood. The cuttings of Populus deltoides L. (clone Kranti) were exposed to four different watering regimes (100, 75, 50 and 25% of the field capacity) and changes in physiological and biochemical parameters related with drought tolerance were recorded. Alterations in physiological (i.e. decrease in relative water content) and biochemical parameters (i.e. increase in proline and soluble sugar content and build-up of malondialdehyde by-products) occurred in all the three levels of water stress, although drought represented the major determinant. Drought treatments (75%, 50% and 25% FC) decreased plant height, radial stem diameter, harvest index, total biomass content and RWC in all the three watering regimes compared to control (100% FC). Biochemical parameters like proline, soluble sugar and MDA content increased with severity and duration of stress, which helped plants to survive under severe stress. It was analyzed that for better wood yield poplar seedlings should avail either optimum amount of water (amount nearly equal to field capacity of soil) or maximum withdrawal up to 75% of field capacity up to seedling establishment period (60 days). Furthermore, this study manifested that acclimation to drought stress is related with the rapidity, severity, and duration of the drought event of the poplar species.

Effects of drought stress on growth, physiological and biochemical parameters in fine roots of Quercus variabilis Bl. seedlings

2014 ◽  
Vol 34 (15) ◽  
Author(s):  
吴敏 WU Min ◽  
张文辉 ZHANG Wenhui ◽  
周建云 ZHOU Jianyun ◽  
马闯 MA Chuang ◽  
韩文娟 Han Wenjuan
Keyword(s):  
Drought Stress ◽  
Fine Roots ◽  
Biochemical Parameters ◽  
Quercus Variabilis ◽  
Effects Of Drought ◽  
Physiological And Biochemical

Evaluation of green gram genotypes for drought tolerance by PEG (polyethylene glycol) induced drought stress at seedling stage

2019 ◽  
Author(s):  
M. Jincya ◽  
V. Babu Rajendra Prasad ◽  
P. Jeyakumara ◽  
A. Senthila ◽  
N. Manivannan
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Moisture Stress ◽  
Germination Percentage ◽  
Seedling Stage ◽  
Green Gram ◽  
Stress Index ◽  
Seedling Mortality ◽  
Seed Vigour ◽  
Selection Of

Drought stress is one of the major constraints for pulse production which negatively affecting its growth and production. Screening and selection of desirable genotypes for drought tolerance is the first and foremost important step in pulse breeding program. In green gram standardization for moisture stress was done under laboratory conditions using various concentration of PEG 6000 and 50% seedling mortality was observed at 0.5 MPa of moisture stress. Using this level of moisture stress 108 green gram genotypes were screened for their drought tolerance at seedling level and the following parameters viz., germination percentage, promptness index, radicle length, root length stress index, germination stress index and seed vigour were recorded. Observations revealed that the following green gram genotypes COGG 1332, VGG 16069, VGG 17003, VGG 17004, VGG 17009, VGG 17019 and VGG 17045 were found highly tolerant to moisture stress at seedling stage.

scholarly journals Effect of Salinity and Drought Stress on Germination Indices of Two Thymus Species

2012 ◽  
Vol 45 (1) ◽  
pp. 27-35 ◽  
Author(s):  
F. Khoshsokhan ◽  
M. Babalar ◽  
H. Chaghazardi ◽  
M. Moghadam
Keyword(s):  
Drought Stress ◽  
Germination Rate ◽  
Germination Percentage ◽  
Relative Resistance ◽  
Field Crops ◽  
Root And Shoot Length ◽  
Medical Plants ◽  
West Azerbaijan ◽  
Germination Indices ◽  
Arid And Semiarid

Effect of Salinity and Drought Stress on Germination Indices of Two Thymus SpeciesThe environmental stress such as, salinity (soil or water) and drought are serious obstacles for medical plants and field crops in further areas of the world, especially arid and semiarid regions. In order to investigate salinity and drought stress onT. daenensisand T.kotschyanusgermination indices, an experiment was carried out. To create salinity stress, sodium chloride (NaCl) at the levels of 0 (as control), -3, -6 and -9 bar, and for drought stress, polyetylenglycol 6000 (PEG 6000) in osmotic levels at 0 (as control), -3, -6 and -9 bar were used. Effect of drought and salt levels on investigated traits significant at 0.01. Result showed significance different between evaluated indices. Increasing of stress levels lead to reduction of germination and root and shoot length. Salt stress only in high levels reduced germination rate. Therefore,T. daenensisandT. kotschyanushave relative resistance to salinity in germination stage. Decrease in osmotic potential progressively inhibited seed germination of the two thyme species. In all salt treatments, maximum germination percentage inT. kotschyanusrelated to West Azerbaijan population and maximum germination rate related to Gazvin population. But in T. daenensis the highest values (both rate and percentage germination) were observed in Arak population. The germination rate of T.daenensisto the drought stress was more than theT. kotschyanusgermination rate like the germination percentage. Comparing the two stresses, it appears that drought has more effect than salt in germination indices.

scholarly journals The effect of combination of indigenous phosphate solubilizing bacteria of Riau, Indonesia on the available phosphorus and phosphorus uptake of soybean

2018 ◽  
Vol 10 (3) ◽  
pp. 146-150
Author(s):  
LUFITANUR ALFIAH ◽  
DELITA ZUL ◽  
NELVIA NELVIA
Keyword(s):  
Phosphatase Activity ◽  
Soil Phosphorus ◽  
Peat Soil ◽  
Phosphorus Uptake ◽  
P Uptake ◽  
Available P ◽  
Available Phosphorus ◽  
Alkaline Soil ◽  
Phosphate Solubilizing Bacteria ◽  
Phosphate Solubilizing

Alfiah L, Zul D, Nelvia N. 2018. The effect of combination of indigenous phosphate solubilizing bacteria of Riau, Indonesia on the available phosphorus and phosphorus uptake of soybean. Nusantara Bioscience 10: 146-150. Despite the abundant amount of phosphorus (P) in the soil, P uptake by the plants is very limited. In acidic soil, phosphorus (P) is bound to aluminum (Al) and iron (Fe), whereas in the alkaline soil, phosphorus (P) is bound to calcium (Ca). The improvement of efficiency and availability of P to plants can be made by utilizing a group of solubilizing phosphate microorganisms. Potency test to investigate the P solubility by Phosphate Solubilizing Bacteria (PSB) has been conducted by isolating the bacteria from peat soil at Biosphere Reserves of Giam Siak Kecil Bukit Batu, Riau, Indonesia. The semi-quantitative test revealed that the PSB were able to dissolve Ca3 (PO4)2, FePo4 and phosphate rock. However, the adaptation ability and potency of PSB from indigenous Riau peat soil inoculated into soybean (Glycine max L. Merr) plants in the mineral soil have not yet been investigated. The present study was carried out from March to June 2015 on the alluvial soil in Babussalam Village, Rambah Sub-district, Rokan Hulu District, Riau. The aim of this study was to determine the effect of PSB inoculation on bacterial population and phosphatase activity. The study also aimed to determine the available P and P uptake and their impact on soybean growth and production. The study employed a factorial experiment laid out in a completely randomized design (CRD) consisted of two factors, i.e., soil treatment and PSB. The first factor comprised of two levels, i.e., T0: non-sterilized soil, T1: sterilized soil. The second factor consisted of 4 levels, i.e., B0: without PSB inoculation, B1: inoculation using 2 isolates of PSB (BB_UB6 and BB_K9), B2: inoculation using 3 isolates of PSB (BB_UB6, BB_K9 and BB_K2), and B3: inoculation using 4 isolates of PSB (BB_UB6, BB_K9, BB_K2, and BB_HS13). The results showed that inoculation of starter 3 had the highest phosphatase activity rate of 12.43 μg p NP g-1 hour-1. The highest available P was produced by starter 2, while the P uptake on non-sterilized soil was higher than that on the sterilized soil at 2.63 mg plant-1. PSB inoculation and soil sterilization did not significantly affect the population of phosphate solubilizing bacteria.

scholarly journals Effects of Vermicompost on Some Morphological, Physiological and Biochemical Parameters of Lettuce (Lactuca sativa var. crispa) under Drought Stress

2018 ◽  
Vol 47 (2) ◽  
pp. 352-358 ◽  
Author(s):  
Sevinç KIRAN
Keyword(s):  
Drought Stress ◽  
Lactuca Sativa ◽  
Enzyme Activities ◽  
Biochemical Parameters ◽  
Stress Conditions ◽  
Antioxidant Enzyme Activities ◽  
Severe Drought ◽  
Shoot Height ◽  
Mda Content ◽  
Physiological And Biochemical

Vermicompost can play an effective and important role in plant growth and development and also in reducing harmful effects of various environmental stresses on plants. The vermicompost fertilizer application was evaluated for the growth, physiological and biochemical parameters of lettuce (Lactuca sativa var. crispa) plants under drought stress conditions. Tests were carried out at different levels of vermicompost (0, 2.5 and 5%) and drought stress [no stress, moderate drought, and severe drought at 100, 50 and 25% of field capacity]. In comparison to control (vermicompost at 0%), lettuce plants treated with vermicompost at 2.5 or 5%  had higher shoot height, shoot fresh weight, relative water content, stomatal conductance, chlorophyll a, chlorophyll b , total chlorophyll and carotenoid contents under moderate and severe drought stress conditions. Malondialdehyde (MDA) content and superoxide dismutase (SOD) and catalase (CAT) activities increased while plants under drought stress conditions. Application of vermicompost caused higher SOD and CAT enzyme activities and lower MDA content under drought stress. Enhancement in antioxidant enzyme activities as a result of vermicompost destroyed reactive oxygen species. Therefore, application of vermicompost under moderate and severe drought stress decreased MDA content in lettuce plant cells. Data indicated a positive effect of the vermicompost on the growth of lettuce under drought stress conditions.

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