scholarly journals Gamze Kaya GERMINATION, STOMATAL AND PHYSIOLOGICAL RESPONSE OF ROCKET (Eruca sativa L.) TO SALINITY

2021 ◽  
Vol 20 (4) ◽  
pp. 135-144
Author(s):  
Gamze Kaya
Keyword(s):  
Chlorophyll Content ◽  
Dry Matter ◽  
Germination Percentage ◽  
Tolerance Index ◽  
Eruca Sativa ◽  
Cell Membrane Stability ◽  
Spad Value ◽  
Pore Length ◽  
Relative Water ◽  
Mean Germination Time

The response of rocket (Eruca sativa L.) to salinity stress was tested for several germination and physiological parameters during seedling development. Two rocket cultivars (Ilıca and Istanbul) and various salinity stresses of 0, 5, 10, 15 and 20 dS m–1 created by NaCl were used in the study. Germination percentage (GP), mean germination time (MGT), germination index (GI), germination stress tolerance index (GSTI), stomata morphology, chlorophyll content (SPAD value), leaf dry matter, relative water content (RWC), cellular injury (CI) and cell membrane stability (CMS) were evaluated. Results showed that high salinity stresses led to a decrease in GP, GI and GSTI index, while MGT increased. Salinity reduced stoma length and pore length. Under saline conditions, leaf dry matter, chlorophyll content and CMS increased, while RWC decreased. Also, CI was enhanced by salinities over 10 dS m–1. It was concluded that lower CMS, CI and RWC, and greater dry matter and chlorophyll were considered as salinity tolerance at the seedling stage of the rocket, and Istanbul was more tolerant to salinity than Ilıca.

scholarly journals Potasssium chloride as a nutrient seed primer to enhance salt‑tolerance in maize

2012 ◽  
Vol 47 (8) ◽  
pp. 1181-1184 ◽  
Author(s):  
Badar‑uz‑Zaman ◽  
Arshad Ali ◽  
Syed Ishtiaq Hyder ◽  
Muhammad Arshadullah ◽  
Saqib Umar Bhatti
Keyword(s):  
Salt Stress ◽  
Salinity Stress ◽  
Dry Matter ◽  
Germination Rate ◽  
Seed Priming ◽  
Germination Percentage ◽  
Stress Conditions ◽  
Maize Crop ◽  
Mean Germination Time ◽  
Muriate Of Potash

The objective of this work was to determine if KCl could be a useful nutrient primer for safe seed germination in maize crop under salt stress conditions. Seed priming was done using 50 mmol L‑1 of muriate of potash, and germination and seedling growth were evaluated after salt stress with NaCl up to 50 mmol L‑1. Another set of seeds was tested under the same salt stress conditions without priming. Under salinity stress, germination percentage, germination rate index, germination coefficient, and seedling vigor indexes were higher in primed seeds. In unprimed seeds, mean germination time increased, while the germination rate index and the fresh and dry matter mass decreased more sharply with salinity stress. The Na/K ratio was higher in unprimed seeds.

scholarly journals Salinity reduced growth PS2 photochemistry and chlorophyll content in radish

2007 ◽  
Vol 64 (2) ◽  
pp. 111-118 ◽  
Author(s):  
Muhammad Jamil ◽  
Shafiq ur Rehman ◽  
Kui Jae Lee ◽  
Jeong Man Kim ◽  
Hyun-Soon Kim ◽  
...  
Keyword(s):  
Leaf Area ◽  
Chlorophyll Content ◽  
Salt Concentration ◽  
Germination Rate ◽  
Photochemical Efficiency ◽  
Germination Percentage ◽  
Photochemical Quenching ◽  
Leaf Water Content ◽  
Spad Value ◽  
Salt Level

When plants are grown under saline conditions, photosynthetic activity decreases leading to reduced plant growth, leaf area, chlorophyll content and chlorophyll fluorescence. Seeds and seedlings of radish (Raphanus sativus L.) were grown in NaCl solutions under controlled greenhouse conditions. The NaCl concentrations in complete nutrient solutions were 0 (control), 4.7, 9.4 and 14.1 dS m-1. The salinity reduced germination percentage and also delayed the germination rate as the salt level increased. Lengths and fresh weights of root and shoot decreased with the increasing salt concentration. Furthermore, photochemical efficiency of PS2 (Fv/Fm), photochemical quenching coefficient (qP), non photochemical quenching coefficient (qN), leaf area and chlorophyll content (SPAD value) were also reduced (P < 0.001) by salt stress. In contrast, the Fo/Fm ratio increased with increasing salt concentration while salinity showed no effect on the efficiency of excitation captured by open PS2 (Fv'/Fm'), electron transport rate (ETR), and leaf water content. Linear regression shows that the photochemical efficiency of PS2 (Fv/Fm) had a positive relationship with the photochemical quenching coefficient (qP), leaf area and chlorophyll content but had no relation with Fv'/Fm', Fo/Fm, and qN.

scholarly journals Effects of drought stress on germination and seedling growth of different field pea varieties

2021 ◽  
pp. 59-70
Author(s):  
Gordana Petrovic ◽  
Tomislav Zivanovic ◽  
Radmila Stikic ◽  
Zorica Nikolic ◽  
Dusica Jovicic ◽  
...  
Keyword(s):  
Seed Germination ◽  
Osmotic Stress ◽  
Seedling Growth ◽  
Germination Percentage ◽  
Field Pea ◽  
Tolerance Index ◽  
Germination Time ◽  
Mean Germination Time ◽  
Effects Of Drought ◽  
Osmotic Potentials

Germination and seedling growth of seven genotypes of field pea (Pisum sativum L.) were studied in PEG-6000 solution having osmotic potentials -0.1 and -0.2 MPa. A study was undertaken to evaluate the influence of different osmotic potentials (MPa) on seed germination percentage (GP) and mean germination time (MGT). Results show that the percentage of germination decreased with a decrease in osmotic potential, while mean germination time increased. Variety Javor is much more sensitive than the other varieties at all levels of osmotic stress. By contrast, the lowest sensitivity of germination and MGT was found in varieties Mraz and Trezor. Seed germination tests at -0.1 to -0.2 MPa have the potential to be used as tests in field pea. Osmotic stress exposure and its duration significantly affected the growth of seedlings (shoot and root) and the accumulation of biomass, while its effect was more prominent on the growth of the shoot than on root growth, which was also confirmed by the root tolerance index.

scholarly journals Effect of seed priming on maize (Zea mays L.) seedling emergence under different sowing dates

2015 ◽  
Vol 39 (4) ◽  
pp. 693-707 ◽  
Author(s):  
MM Rahman ◽  
KU Ahammad ◽  
M Ahmed
Keyword(s):  
Dry Matter ◽  
Agricultural Research ◽  
Block Design ◽  
Germination Percentage ◽  
Germination Index ◽  
Research Station ◽  
Percentage Germination ◽  
Germination Time ◽  
Sowing Dates ◽  
Mean Germination Time

The experiment was carried out at the research field of Regional Agricultural Research Station, Jessore during 2009-10 and 2010-2011 to find out the effect of priming and ambient temperatures due to different sowing dates on emergence of maize seedlings. The experiment consisted of two priming methods viz., i) Priming, ii) Non-priming, and ten sowing dates viz., i) 15 November, ii) 30 November, iii) 15 December iv) 30 December v) 14 January vi) 29 January vii) 13 February viii) 28 February, ix) 15 March, and x) 30 March. The experiment was laid out in a randomized complete block design with three replications. Results showed that germination percentage, germination index, mean germination time and dry matter/plant were influenced significantly by priming. The highest germination percentage, germination index, dry matter/plant and lowest mean germination time were recorded from primed seed sown in March followed by February and November sowings but those were very poor in December and January sowings. So, primed seeds should be sown in November and February for better stand establishment of maize. DOI: http://dx.doi.org/10.3329/bjar.v39i4.22549 Bangladesh J. Agril. Res. 39(4): 693-707, December 2014

Nutrient Priming in Different Maize Cultivars and Evaluation of Vigour Improvement Under Controlled Conditions

2017 ◽  
Vol 60 (2) ◽  
pp. 65-69
Author(s):  
Adnan Umair ◽  
Muhammad Abid ◽  
Ijaz Ali ◽  
Kashif Bashir ◽  
Waqas Naseem ◽  
...  
Keyword(s):  
Dry Matter ◽  
Seed Priming ◽  
Germination Percentage ◽  
Plant Vigour ◽  
Maize Cultivars ◽  
Matter Production ◽  
Germination Characteristics ◽  
Vigour Index ◽  
Mean Germination Time ◽  
Crop Stand

Laboratory and pot experiments were conducted to study the effect of seed priming on vigourand germination characteristics of different maize cultivars during the year 2011. The seeds of four maizecultivars viz. EV 7004Q, Islamabad Gold, Rakaposhi and Sohan-3 were primed using 0% P (dry seededcontrol), 0.6% P and 1.2% P solutions of KH2PO4 for 16 h. The experiment was laid out in CompleteRandomized Design (CRD) having three replicates. All the seed priming treatments significantly improvedthe plant vigour in terms of enhanced germination percentage, reduced mean germination time (MGT),improved root, shoot lengths and dry matter production. Among the four cultivars of maize the IslamabadGold performed best followed by Sohan-3. Highest germination (94.57%) and vigour index (VI) of 431.66was observed in Islamabad Gold where 1.2% P applied compared to dry seeded control. Nutrient seedpriming may be used to improve germination vigour and crop stand establishment under field conditionsleading to good yield targets in maize under rainfed conditions.

scholarly journals AIR POLLUTION TOLERANCE INDEX OF WHEAT AND RICE IN THE PROXIMITY OF GAS BASED POWER PLANT

2021 ◽  
Vol 9 (6) ◽  
pp. 791-804
Author(s):  
Priya Choudhary ◽  
Shakeel Ahmad Khan ◽  
Ambrina Sardar Khan ◽  
Sandeep Kumar ◽  
Lal Chand Malav
Keyword(s):  
Air Pollution ◽  
Ascorbic Acid ◽  
Power Plant ◽  
Water Content ◽  
Chlorophyll Content ◽  
Relative Water Content ◽  
Air Pollutants ◽  
Tolerance Index ◽  
Relative Water ◽  
Polluted Sites

The study aimed to identify the tolerance level of rice and wheat due to air pollutants around the gas-based power plant. Ten sites were selected around 10km radius of gas based power plant. Major air pollutants like NOx, SOx, ozone, and PM10 were monitored in ten sites during the growth of rice and wheat. The Air Quality Index (AQI) of villages falls mostly in the category of moderately polluted sites. Air Pollution Tolerance Index (APTI) is a tool applied for categorizing sensitive or tolerant plants towards air pollution and is calculated by using four biochemical parameters like total chlorophyll content, ascorbic acid, pH, and relative water content of rice and wheat. Results indicated that the pH of cell sap of both the crops was acidic to neutral pH (3.5-6.9) at polluted sites while neutral to slightly alkaline (7.0-7.9) at less polluted sites. Ascorbic acid content was high at polluted sites since ascorbic acid shows a defense mechanism against air pollution. Chlorophyll content (up to 0.61mg/g) and relative water content have shown a significant decrease at most polluted sites. As per APTI values (APTI<11), both the crops were sensitive to air pollution in the selected area. APTI might be beneficial in the selection of crop species in the polluted area which shows that a higher concentration of air pollutants can damage crops severely. APTI was found to be positively correlated with pH, total chlorophyll content, and relative water content and negatively correlated with ascorbic acid.

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)

Effect of exogenous nitric oxide (NO) supply on germination and seedling growth of mungbean (cv. Nm-54) under salinity stress

2017 ◽  
Author(s):  
Muhammad Salahuddin ◽  
Fahim Nawaz ◽  
Muhammad Shahbaz ◽  
Muhammad Naeem ◽  
Bilal Zulfiqar ◽  
...  
Keyword(s):  
Salt Stress ◽  
Stress Tolerance ◽  
Seedling Growth ◽  
Dry Matter ◽  
Germination Percentage ◽  
Stress Conditions ◽  
Tolerance Index ◽  
Fresh Weight ◽  
Chlorophyll Contents ◽  
Exogenous Nitric Oxide

The present study evaluated the effects of exogenous NO supply, using sodium nitroprusside (SNP) as a source of NO, on germination and seedling growth of mungbean (Vigna radiata) under salt stress conditions. The results showed that the seeds treated with NO solution (0.2 mM SNP) exhibited 80% and 109% higher germination percentage and germination stress tolerance index (GSI) than untreated seeds (control) under salt stress conditions. Similarly, the seedlings fertigated with NO maintained the highest values of 77.8%, 84.3%, 77.2%, 60.5% and 100.3% for plant height stress tolerance index (PHSI), root length stress tolerance index (RLSI), shoot fresh weight stress tolerance index, root fresh weight stress tolerance index (RFSI) and dry matter stress tolerance index (DMSI), respectively. Moreover, the NO fertigated seedlings maintained 57% higher chlorophyll contents than control seedlings. It is concluded that exogenous NO supply is an effective approach to ensure uniform stand establishment in saline regions of the world.

scholarly journals Gibberellic acid and nitrogen efficiently protect early seedlings growth stage from salt stress damage in Sorghum

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Adam Yousif Adam Ali ◽  
Muhi Eldeen Hussien Ibrahim ◽  
Guisheng Zhou ◽  
Nimir Eltyb Ahmed Nimir ◽  
Aboagla Mohammed Ibrahim Elsiddig ◽  
...  
Keyword(s):  
Chlorophyll Content ◽  
Seedling Growth ◽  
Soluble Protein ◽  
Dry Weight ◽  
Sod Activity ◽  
Seedling Length ◽  
Relative Water ◽  
Emergence Percentage ◽  
Negative Impacts ◽  
Stress Damage

AbstractSalinity one of environmental factor that limits the growth and productivity of crops. This research was done to investigate whether GA3 (0, 144.3, 288.7 and 577.5 μM) and nitrogen fertilizer (0, 90 and 135 kg N ha−1) could mitigate the negative impacts of NaCl (0, 100, and 200 mM NaCl) on emergence percentage, seedling growth and some biochemical parameters. The results showed that high salinity level decreased emergence percentage, seedling growth, relative water content, chlorophyll content (SPAD reading), catalase (CAT) and peroxide (POD), but increased soluble protein content, superoxide dismutase (SOD) activity and malondialdehyde (MDA) content. The SOD activity was decreased by nitrogen. However, the other measurements were increased by nitrogen. The interactive impact between nitrogen and salinity was significant in most parameters except EP, CAT and POD. The seedling length, dry weight, fresh weight, emergence percentage, POD, soluble protein and chlorophyll content were significantly affected by the interaction between GA3 and salinity. The GA3 and nitrogen application was successful mitigating the adverse effects of salinity. The level of 144.3 and 288.7 μm GA3 and the rate of 90 and 135 kg N ha−1 were most effective on many of the attributes studied. Our study suggested that GA3 and nitrogen could efficiently protect early seedlings growth from salinity damage.

scholarly journals Tolerance of Basil Genotypes to Salinity

2017 ◽  
Vol 9 (11) ◽  
pp. 283 ◽  
Author(s):  
Renata V. Menezes ◽  
André D. Azevedo Neto ◽  
Hans R. Gheyi ◽  
Alide M. W. Cova ◽  
Hewsley H. B. Silva
Keyword(s):  
Salinity Tolerance ◽  
Dry Matter ◽  
Membrane Integrity ◽  
Dry Mass ◽  
Ocimum Basilicum ◽  
Medicinal Species ◽  
Relative Water ◽  
Salinity Levels ◽  
Number Of Leaves ◽  
Inorganic Solutes

Basil (Ocimum basilicum L.) is a medicinal species of Lamiaceae family, popularly known for its multiple benefits and high levels of volatile compounds. The species is considered to be one of the most essential oil producing plants. Also cultivated in Brazil as a condiment plant in home gardens. The objective of this study was to evaluate the effect of salinity on the growth of basil in nutrient solution of Furlani and to identify variables related to the salinity tolerance in this species. The first assay was performed with variation of five saline levels (0 - control, 20, 40, 60 and 80 mM NaCl). In the second assay six genotypes were evaluated in two salinity levels 0 and 80 mM NaCl. The height, stem diameter, number of leaves, dry mass and inorganic solutes in different organs, photosynthetic pigments, absolute membrane integrity and relative water content were evaluated. All biometric variables in basil were significantly reduced by salinity. Dry matter yield and percentage of membrane integrity were the variables that best discriminated the characteristics of salinity tolerance among the studied basil genotypes. Basil genotypes showed a differentiated tolerance among the genotypes, the ‘Toscano folha de alface’ being considered as the most tolerant and ‘Gennaro de menta’ as the most sensitive, among the species studied.

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