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Home > Effects of Humic Acid on Seed Germination and Seedling Growth of Sub- Tropical Halophytes.

Effects of Humic Acid on Seed Germination and Seedling Growth of Sub- Tropical Halophytes.

Thesis Info

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Author

Sonia Bano Abbasi

Program

PhD

Institute

University of Karachi

City

Karachi

Province

Sindh

Country

Pakistan

Thesis Completing Year

2017

Thesis Completion Status

Completed

Subject

Botany

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/11907/1/sonia%20bano%20abbasi%20botany%202017%20uok%20karachi%20prr.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726021217

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This study was carried out to determine the effects of three types of humic acids (HA1 and HA2 and HA3) and different humic acid concentrations (0, 250 and 500 mg L-1) on seed germination of ten halophytic species under two thermoperiods (10/20 and 20/30 oC); two photoperiods (12/12h dark/light and 24h dark) and two NaCl treatments (nonsaline control vs. salinity reported to induce 50% germination inhibition, respectively). Humic acid did not seem to alleviate seed germination of most halophytes under nonsaline conditions at sub-optimal thermoperiod (10/20 oC) except for Aeluropus lagopoides andArthrocnemum macrostachyum. Humic acid alleviated seed germination of Urochondra setulosa in the presence of light (12/12h; light/dark photoperiod) under saline conditions. Lower concentration (250 mg L-1) of the three humic acid types improved seed germination of Aeluropus lagopoides, Cyperus conglomeratus, Desmostachya bipinnata, Halopeslis. perfoliata, Pharagmites karka under saline conditions in the absence of light. However, all humic acids at 500 mg L-1 alleviated the salinity effects on seed germination of Sporobolus ioclados. Humic acid treatments could partly substitute the light requirement of few halophyte seeds germinated under saline conditions. The role of humic acid (HA1) was also studied on the seedling growth, water relations, ion regulation and photochemistry of Urochondra setulosa under saline conditions (0, 300 and 600 mM NaCl). Plants maintained water use efficiency regardless of increasing NaCl concentrations but the increase in Na+ was counter-balanced by lowering Na+/K+ ratios of root and shoot. Selective absorption of K+ over Na+ was improved by humic acid in both NaCl treatments where as, K+ over Na+ transport was improved only in 600 mM NaCl. Humic acid improved electron transport rate (rETR) and Non-photochemical quenching of fluorescence (NPQ) at 600 mM NaCl. Humic acid treatment improved anti-oxidant defense at cellular level by decreasing the percentage of blue stained cells, malondialdehyde (MDA),and hydrogen peroxide(H2O2) in leaves under saline conditions. Humic acid application appears to be a low cost bio-stimulant for enhancing seed germination and growth of halophytes under saline conditions.
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سلطان کھاروی دیاں غزلاں دے وشے تے فنی خوبیاں

سلطان کھاروی دیاں غزلاں دے وشے تے فنی خوبیاں

غزل شاعری دا اک اجیہا کھیترا اے جس دے ہر شعر وچ دوجے توں وکھرا سر نانواں بیان کیتا سکدا اے ۔ایسے گن پاروں ایس صنف نے صدیاں پرانیاں صنفاںنو ں پچھا نہہ کر دتا اے ،تے ہر پاسے ایسے دی پردھانگی وکھائی دیندی اے ۔بہت ساریاں کویاں ایس صنف  راہیںنویکلے وچار پر گٹ کر کے کیول ایس صنف نوں امیرای نہیں کیتا سگوں اپنے آپ نوں کوتا وچ امر وی کر لیا اے ۔

سمکالی کویاں دے غزل مہاڑ بارے جدوں کھوج کرئیے تاں دھیان آپو سلطان کھاروی ول جاندا اے ۔کیوں جے ایس بہوں گُنی کوی نے کوتا کھتیر دے نال نال اک وڈا ناں غزل کھتیر وچ وی کمایا اے ۔اوہناں حیاتی نال تعلق رکھن والے ہر پکھ نوں اپنیاں غزلاں دا وشاد بنا یا اے ۔کجھ دا اویروا انج اے ۔

کسے کوی دی علمیت دا گویڑا اوس دی کوتا وچ بیان ہوئی اتہاس نگاری توں لایا جا سکدا اے ۔کیوں جے عام کوی گھٹ ای اتہاس نوں غزلاں وچ بیان کر دے نیں ۔فیر ایہہ کم ڈاڈھا اوکھا وی اے ۔کیوں جے اتہاسک گھٹناواں نوں اوہناں دے پچھو کڑ وچ بیان اوہ کوی ای کر سکدا اے جس نوں اتہاس دی بھرنویں جانکاری ہووے تے نال اوہ شاعری دے فن اتے تگڑی پکڑ وی رکھدا ہووے ۔کھاروی ہوری ایس پکھ توں بہوں بھاگ شالی ہن کہ اوہ کیول اتہاس دی بھر پور جانکاری ای نہیں رکھدے سگوں ایہناں واقعات نوں شعراں وچ بیان کرن دی جاچ وی رکھدے نیں ۔اوہناں اسلامی اتہاس ،جگت اتہاس ، پنجاب اتہاس تے ایس دھرتی دیاں پریم کتھاواں نوں وی شعراں وچ بیان کیتا اے ۔کجھ مثالاں انج نیں ۔

اسلامی اتہاس وچ حضرت ابراہیم ؑ  نوں اگ وچ سٹن والے واقعہ نو ںشاعری وچ رج...

اصلاح معاشرہ اور نسل نو کی ذمہ داری سیرت طیبہ کی روشنی میں

Despite the greenness of youth, it is a moment in a Muslim's life when his belief is likely to be hardened frequently by enticements and temptations. It is the responsibility of young Muslims to triumph over these enticements and protect their Islamic way of life, obey the teachings of Prophet, share Islam with others and study the teachings of the Holy Qur’ān. After the fulfillment of these essential obligations, young Muslims are predictable above all to play a significant role in reformation of society. Within the Muslim circle, it is supposed that youth is the most imperative period of life. Youth as bone of nation plays a vital role. They have the capacity to build nation of towards success in all the fields of life by utilizing the abilities. This is the time in which opinions, habits and beliefs are formed, and it is vital for the time to be spent in individual development. For instance, Muslim youth should dedicate themselves into making and spreading the glimpses of Sīrah in society; by avoiding the temptations of time in loneliners and solitude andwith the opposite sex and of seeking knowledge by following the preaching’s of Prophet Muhammad (r). In this way, Muslim youth will be a spiritually strong enough to serve as a role model for other young people and society as whole. The article manifests the same components in the light of teachings of Holy prophet (r). Consolidating with Qur'anic verses, imminent exegetical literature and sayings of the companions of Prophet Muhammad (r), youth can play an active and positive role in reformation and development of society.

Devel Lopmen of Ra Nt Apid Diag Gnostic Metho for C Od Xanth Homonas Campestris Pv. Sesam and Sc C S Mi Creenin of Ng Sesamum Germ S Mplasm F for Res Sistance E

Sesame (Sesamum indicum L.) locally called as Til is an important conventional and industrial oil seed crop in Pakistan and is mainly cultivated on marginal lands in the rain feed and irrigated areas throughout the country. Pakistan ranks fourteenth among major sesame producing countries in the world. Pakistan is facing a chronic shortage in edible oil and the situation is getting serious with alarmingly explosions of population. Its indigenous production is below the utilization level and there exists wide gap between production and utilization. However, its production is declining due to prevalence of several biotic and abiotic factors. Among the biotic factors, bacterial blight incited by Xanthomonas campestris (pamel) Dowson sesami (Sabet and Dowson, 1960) Dye (Xcs) is most serious and devastating disease and responsible for colossal losses and frequently complete failure of crop. The appears on young as well as adult plants, and produce extensive blight on the foliage, stem and petioles, resulting in defoliation collapse of tissue and sterility of flowers. The pathogen is responsible for sesame production constraints during monsoon season. Despite the shortage of edible oil, no profound efforts have been made on this important oil seed crop with reference to diseases. At present, the disease has become a limiting factor and a serious impediment to successful production of sesame in Pakistan. To handle the shortage of edible oil, there was an urgent need to explore the basic information on host pathogen interaction. The present work consisted of four experiments. The first study was the monitoring of the disease. The disease had been established in some fields of Punjab xix province from the past 25 years where repeated outbreaks of the disease were being observed during monsoon season each year. Most of the farmers were not certain about bacterial blight symptomology and its casual organism. Most of the commercial varieties used by farmers were imported whose disease resistant information was not known. Bacterial blight was found in areas where diverse soil, pH, temperature, relative humidity and rainfall. The severity of the disease depends on the amount of the rainfall. The sowing dates had a significant influence on the % incidence of the bacterial blight of sesame. The incidence of the disease decreases with delay of sowing dates. The second study was conducted to the pathogen was isolated from different parts of the infected plants including stem, twigs and seeds using different media as nutrient agar, yeast dextrose agar, yeast dextrose calcium carbonate agar and colonial behavior of the isolates were recorded by exposing these at different temperatures, hypersensitive responses and pathogenicity were also performed. It was also recorded that an approximate temperature of 28oC with relative humidity 85-95 % and rainfall enhance the pathogenic infestation. The third study was production of polyclonal antibodies. The polyclonal antibody was produced in a rabbit. It was tested against homologous antigen (host antigen) etc., ELISA kit was developed which could be used for large scale screening of germplasm. The forth study was conducted large scale screening of sesame genotypes identified resistant resources to be utilized by the breeder in the evaluation of disease resistant varieties leading to increase in production and substantial benefits to the farmers. It is hoped that present studies will provide basis for improved prediction and diagnosis together with formulation of management strategies preferably breeding for long lasting resistance against this disease.