scholarly journals Relative water content, cell membrane stability, essential oil and morphology of Dracocphalum moldavica L. are influenced by drought stress and manure

2014 ◽  
Vol 5 (1) ◽  
pp. 421-428 ◽  
Keyword(s):  
Drought Stress ◽  
Essential Oil ◽  
Cell Membrane ◽  
Water Content ◽  
Relative Water Content ◽  
Membrane Stability ◽  
Cell Membrane Stability ◽  
Relative Water

scholarly journals Proline, Protein, Rwc and Msi Contents Affected by Paclobutrazol and Water Deficit Treatments in Strawberry Cv. Paros

2015 ◽  
Vol 48 (1) ◽  
pp. 107-114 ◽  
Author(s):  
S. Parvin ◽  
T. Javadi ◽  
N. Ghaderi
Keyword(s):  
Drought Stress ◽  
Cell Membrane ◽  
Water Content ◽  
Relative Water Content ◽  
Stability Index ◽  
Membrane Stability ◽  
Membrane Stability Index ◽  
Cell Membrane Stability ◽  
Relative Water ◽  
Leaf Relative Water Content

Abstract Drought is one of the critical environmental stresses that affect growth and development of plants. Plants are damaged directly and indirectly under drought stress. Increasing water stress tolerance in plants is crucial. The aim of this study was to investigate the effects of different water stress levels (-1, -5, and -10 bars) and paclobutrazol application (0 and 50 mg-1) on strawberry cv. Paros. According to analyses of variance there were significant effects of drought stress and paclobutrazol application on leaf area, leaf dry weight, leaf relative water content (RWC), cell membrane stability index (MSI), proline and protein content of leaves. Leaf area, leaf dry weight, leaf relative water content and cell membrane stability index decreased in drought stress, especially at -10 bars. Proline and protein contents were enhanced by increasing water stress levels. Paclobutrazol application increased leaf relative water content and cell membrane stability index, proline and protein contents of leaves. Leaf relative water content was 68.77% in -10 bars drought stress that increased to 79% in paclobutrazol treatment. Also, cell membrane stability index was 69.65% in severe drought stress and reached to 77% in paclobutrazol treatment. According to the results pacloburazol is a benefit substance to ameliorate drought stress effects in strawberry cv. Paros.

Effect of drought stress on different physiological traits in bread wheat

2018 ◽  
Vol 16 (1) ◽  
pp. 1-6 ◽  
Author(s):  
I Nowsherwan ◽  
G Shabbir ◽  
SI Malik ◽  
M Ilyas ◽  
MS Iqbal ◽  
...  
Keyword(s):  
Drought Stress ◽  
Cell Membrane ◽  
Water Content ◽  
Chlorophyll Content ◽  
Relative Water Content ◽  
Membrane Stability ◽  
Physiological Traits ◽  
Wheat Genotypes ◽  
Cell Membrane Stability ◽  
Relative Water

The present study was designed to evaluate the changes in different physiological traits such as proline content, cell membrane stability, relative water content and chlorophyll content under drought stress in sixteen wheat genotypes. Wheat genotypes (99FJ-03, Marvi-2000, WC- 13, WC-24, WC-19, Faisalabad-85, Kaghan, Bahawalpur, Zarlashta, Punjab-96, Shafaq, Maxi-pak, WC-20, Chenab-70, AUR-0809, Chakwal) were sown during rabiseason of 2013-14 following randomized complete block design with three replications. Drought stress was induced by withholding water for 30 days at heading and anthesis stage. Genotypes were significant for different physiological traits like relative water content, proline content, cell membrane stability and chlorophyll content under drought stress which indicated that some genotypes were more tolerant against drought stress than others. Among tested wheat genotypes, Maxi-Pak was found to be potential variety for relative water content, cell membrane stability, chlorophyll content and yield. Hence, it can be used in future wheat breeding programme for developing drought tolerant genotypes.SAARC J. Agri., 16(1): 1-6 (2018)

scholarly journals Cell Membrane Stability and Relative Water Content of Cymbopogon citratus (Lemon Grass)

2019 ◽  
pp. 1-7
Author(s):  
H. M. Maishanu ◽  
A. M. Rabe
Keyword(s):  
Cell Membrane ◽  
Water Content ◽  
Relative Water Content ◽  
Membrane Stability ◽  
Cymbopogon Citratus ◽  
Cell Membrane Stability ◽  
Lemon Grass ◽  
Significant Difference ◽  
Relative Water ◽  
Number Of Leaves

In this research the cell membrane stability (CMS), relative water content (RWC) and effect of different water interval on Cymbopogon citratus (lemon grass) was assessed. The cell membrane stability and relative water content of the plant shows the physiological activity of the plant. The plant sample was subjected to three different watering regimes viz: one, two- and three-days intervals with a control sample irrigated daily for a period of twelve months. Uniform stalk of lemon grass plants were planted into a depth of 7.5 cm composted soil, each treatment was made in triplicate. The evaluated growth parameters where height of the plant, number of leaves and tillers, which were taken weekly for period of twelve months (year). The height shows a significant difference from first to twelfth month after planting. The height of the plant increases simultaneous with the age of the plant. First month after planting show significant difference in height of sample watered daily and treated samples.  The results shows that the RWC (07.14%) and CMS (52.58%) was low in samples under water stress respectively when compared to well-watered samples (55.41%). No significant difference was observed between samples under one, two and three days interval. The number of leaves differs significantly in the first MAP except in the samples watered daily and three days interval. Maximum number of leaves was achieved at twelfth MAP under one day interval (137.33) followed by samples watered daily (126) and two days interval, while three days interval has the least number of leaves (leaf number). The number of tillers shows significant differences between the means at fifth and sixth MAP, (fifth MAP = 73.33 and sixth MAP = 126) and the treatments under one day intervals (fifth MAP = 18.33 and sixth MAP = 35.67). In the research, samples watered daily and under one day intervals shows high productivity when compared to the remaining treatment.

scholarly journals Potensi Abu Sekam Padi untuk Meningkatkan Ketahanan Oksidatif Non-enzimatik dan Produksi Padi Merah pada Cekaman Kekeringan

2018 ◽  
Vol 46 (1) ◽  
pp. 24
Author(s):  
Diah Rachmawati ◽  
Ni Luh Gde Mona Monika ◽  
Dan Ulfatul Masruroh
Keyword(s):  
Drought Stress ◽  
Water Content ◽  
Relative Water Content ◽  
Photosynthetic Apparatus ◽  
Field Capacity ◽  
Membrane Stability ◽  
Severe Stress ◽  
Enhanced Production ◽  
Relative Water ◽  
Leaf Relative Water Content

<p>Drought inhibits several physiological process and induces oxidative stress due to the enhanced production of reactive oxygen species (ROS) mainly in photosynthetic apparatus. Silicon (Si) is known to increase tolerance of rice against drought stress.  However, long period of intensive crop cultivation depleted the available soil Si by approximately 11-20%. Rice husk ash (RHA) is potential Si source. The objective of this research was to analyze the potency of RHA through pot experiment to observe: 1) internal water balanced; 2) integrity of cell membrane and  antioxidant content; and 3) production of tolerant cultivar ‘Segreng’ and sensitive one ‘Cempo merah’. Application of RHA was at level of 0, 4, and 8 tons ha-1. Drought stress was imposed by with holding water until soil water content reached 50% of field capacity (moderate stress) and 25% of field capacity (severe stress). Application of RHA significantly increased leaf relative water content and membrane stability index of rice ‘Segreng’ and ‘Cempo merah’. Tolerant cultivar ‘Segreng’ had better response than ‘Cempo merah’ as shown by greater leaf relative water content under moderate and severe stress. RHA application at level of 8 tons ha-1 increased index of membrane stability and level of antioxidant (AAred and α-tocopherol) which determine production of both rice ‘Segreng’ and ‘Cempo merah’ during drought.<br /><br />Keywords: antioxidant, field capacity, membrane stability, segreng cultivar, α-tocopherol</p>

scholarly journals Heritability and mode of gene action determination for grain filling rate and relative water content in hexaploid wheat

Genetika ◽  
2012 ◽  
Vol 44 (1) ◽  
pp. 25-32 ◽  
Author(s):  
Ahmad Golparvar
Keyword(s):  
Drought Stress ◽  
Water Content ◽  
Relative Water Content ◽  
Stress Condition ◽  
Gene Action ◽  
Grain Filling ◽  
Stress Conditions ◽  
Filling Rate ◽  
Grain Filling Rate ◽  
Relative Water

Mode of gene action, heritability and determination of the effective breeding strategy for improvement of physiological and traits specifically in drought stress conditions is very important. Therefore, this study was conducted by using two drought susceptible and tolerant wheat cultivars. Cultivars Sakha8 (tolerant) and Pishtaz (susceptible) as parents along with F1, F2, BC1 and BC2 generations were sown in a randomized complete block design with three replications in drought stress conditions. Results of analysis of variance indicated significant difference between generations as well as degree of dominance revealed over-dominance for the both traits. Fitting simple additive-dominance model designated that this model was not able to account for changes of traits relative water content and mean of grain filling rate. It was revealed that m-d-h-i-j model for relative water content and m-d-h-i model for mean of grain filling rate are the best models. Estimation of heritability and mode of gene action indicated that selection for improvement of traits studied in stress condition and specifically in early generations have medium genetic gain. In conclusion, grain filling rate is better than relative water content as indirect selection criteria to improve plant grain yield in drought stress condition.

scholarly journals Effect of cold stress on boro rice seedlings

2017 ◽  
Vol 9 (2) ◽  
pp. 1036-1041 ◽  
Author(s):  
Priyanka Kumari ◽  
H. K. Jaiswal
Keyword(s):  
Cold Stress ◽  
Water Content ◽  
Chlorophyll Content ◽  
Relative Water Content ◽  
Stability Index ◽  
Membrane Stability ◽  
Membrane Stability Index ◽  
Relative Water ◽  
Cold Tolerant ◽  
Boro Rice

Cold stress at seedling stage is a major constraint in boro rice production. Nine boro rice lines were crossed in diallel fashion excluding reciprocals to obtain 36 crosses. All the 36 crosses along with parents were grown in nursery in three seasons (boro-2014, kharif-2015 and boro-2015). Performance of seedlings for survival per cent, chlorophyll content, relative water content, membrane stability index was recorded just before transplanting in all the three seasons. Scoring for cold tolerance was done in both boro seasons. Gautam showed highest survival rate over three seasons. Among crosses, IR 64 x Krishna Hamsa showed highest survival (84%) in boro-2014, MTU 1010 x Jaya (86.33%) in boro-2015 and MTU 1010 x Krishna Hamsa (95.67%) in kharif-2015. Jaya x Krishna Hamsa was most cold tolerant cross over both boro seasons. Significant positive correlation was observed among survival per cent, chlorophyll content, relative water content and membrane stability index over seasons.

Genetics of physiological and agronomical traits linked to salinity tolerance in tomato

2021 ◽  
Vol 72 (4) ◽  
pp. 280
Author(s):  
Mohammad Moradi ◽  
Hamid Dehghani ◽  
Sied Zabihallah Ravari
Keyword(s):  
Cell Membrane ◽  
Salinity Tolerance ◽  
Combining Ability ◽  
Relative Water Content ◽  
Gene Action ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Salt Tolerant ◽  
Cell Membrane Stability ◽  
Relative Water

Improvement of tomato (Lycopersicon esculentum L.) for growth in saline soils is a major goal of tomato breeders. The aim of this study was to identify the genetic combining ability and genetics of salinity tolerance in tomato. Plant materials were grown under normal (NG) and salinity stress (SSG) conditions. Results showed that the genetic controlling mechanism of salinity-related traits and fruit weight is complex and that all genetic components of additive, non-additive and maternal are involved. The nature of gene action for fruit weight and salinity-related traits was significantly affected by salinity stress. Dominance and additive gene action were predominant under NG and SSG, respectively. Under NG, the best general combiner parent for fruit weight was P3 (salt-tolerant with moderate fruit yield). Under SSG, P1 (highly salt-tolerant with low fruit yield) was the best general combiner parent for fruit weight and exhibited high genetic combining ability for K+/Na+, lipoxygenase activity, proline, relative water content, total carbohydrate and cell membrane stability. With the high frequency of genes effective in salt tolerance, the P1 parent appeared as the best specific mating partner with other parents under SSG. Simultaneous selection for fruit weight and surrogate traits (cell membrane stability, proline and relative water content) in a population derived from the P1 × P5 (susceptible with high fruit yield) cross could result in a salt-tolerant tomato genotype.

scholarly journals In vitro screening of rice genotypes using polyethylene glycol under drought stress

2016 ◽  
Vol 27 (2) ◽  
pp. 128-135 ◽  
Author(s):  
J Akte ◽  
S Yasmin ◽  
MJH Bhuiyan ◽  
F Khatun ◽  
J Roy ◽  
...  
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Water Content ◽  
Relative Water Content ◽  
Dry Weight ◽  
Proline Accumulation ◽  
Shoot Length ◽  
Fresh Weight ◽  
Relative Water

Five rice varieties viz. Binadhan-4, Binadhan-5, Binadhan-6, Binadhan-10 and Iratom-24 were evaluated in vitro under different water stress conditions. Several parameters such as germination percentage, shoot length, root length, shoot-root ratio, fresh weight, dry weight, turgid weight, relative water content and proline accumulation were studied. Drought condition was created by MS medium supplemented with five treatments of PEG, with a control such as 0%, 1%, 2%, 3% and 4% of PEG. The highest germination (100%) was found in the variety Binadhan-10 under low water stress conditions induced by 1% PEG. Similarly, the highest percentage of germination was found in all varieties under control condition (0% PEG). The lowest percentage of germination was obtained in the variety Iratom-24. But under severe stress (4% PEG), the highest percentage of germination was found only in the variety Binadhan-10. Moreover, the variety Binadhan-10 was found to be the best at 4% PEG for shoot length, root length, shoot-root ratio, relative water content and also the best at 1% PEG for fresh weight, dry weight, turgid weight. Water stress decreased relative water content and increased proline accumulation in rice. The highest relative water content was recorded in the variety Binadhan-10 and the lowest value recorded in the variety Binadhan-5. The highest proline content was obtained from the binadhan-6 at the highest treatment (4% PEG). Binadhan-10 showed the best performance almost in all the parameters under drought stress because of its own nature of tolerancy.Progressive Agriculture 27 (2): 128-135, 2016

scholarly journals Aphid fecundity and defenses in wheat exposed to a combination of heat and drought stress

2020 ◽  
Vol 71 (9) ◽  
pp. 2713-2722 ◽  
Author(s):  
Haicui Xie ◽  
Jianqin Shi ◽  
Fengyu Shi ◽  
Haiyun Xu ◽  
Kanglai He ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Water Content ◽  
Relative Water Content ◽  
Nutritional Quality ◽  
Defense Responses ◽  
Net Reproductive Rate ◽  
Aphid Infestation ◽  
Grain Aphid ◽  
Relative Water

Abstract Plants are routinely subjected simultaneously to different abiotic and biotic stresses, such as heat, drought, and insect infestation. Plant–insect interactions in such complex stress situations are poorly understood. We evaluated the performance of the grain aphid (Sitobion avenae) in wheat (Triticum aestivum L.) exposed to a combination of heat and drought stresses. We also performed assays of the relative water content, nutritional quality, and responses of phytohormone signaling pathways. Lower relative water content and accumulation of soluble sugars and amino acids were observed in plants exposed to combined heat and drought stress. These conditions increased abscisic acid levels in the absence of aphids, as well as leading to higher levels of jasmonate-dependent transcripts. The grain aphid infestation further increased abscisic acid levels and the abundance of jasmonic acid- and salicylic acid-dependent defenses under the combined stress conditions. Aphids reared on plants grown under drought stress alone showed lower net reproductive rates, intrinsic rates of increase, and finite rates of increase compared with aphids reared on plants in the absence of stress. The heat-treated plants also showed a decreased aphid net reproductive rate. These findings demonstrate that exposure to a combination of stresses enhances plant defense responses against aphids as well as altering nutritional quality.

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