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1
Content available Study of the Phytotoxicity of Olive Mill Wastewater on Germination and Vegetative Growth – Case of Tomato (Solanum lycopersicum L.)
100%
El Kafz G. , Cherkaoui E. , Benradi F. , Khamar M. , Nounah A. , Soukayna A.
Ecological Engineering & Environmental Technology
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2023
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tom Vol. 24, iss. 5
265--274
EN
Olive mill wastewater (effluents from olive oil extraction during harvest) is a source of environmental pollution due to its high acidity and heavy loads of polyphenols and organics. Our aim is to study the phytotoxicity of olive mill wastewater (OMW) at different concentrations on the germination and growth of tomatoes (Solanum lycopersicum L.). To assess this, we measured the percentage of germination (GP), the germination inhibition rate (GIR), the length of the main stem, the number of leaves, and the biomass of the stem, leaves, and roots. The germination test was carried out by placing 25 tomato seeds on filter paper in Petri dishes and then irrigating with different concentrations of OMW (0%, 1%, 2%, 5%, 7%, 10%). The boxes were placed in an incubator at a temperature of 25 °C for 10 days. The results obtained show that, after 10 days of germination, the GP is maximal (more than 98%) at concentrations of less than 7% (r = -0.98; p<0.000) and with an “inhibitory” effect at more than 7% (r = +0.98; p<0.000). However, the growth in length (8.514±2.612 cm) and the number of leaves (4.667±0.866 leaves) were maximum, respectively, at 2% and 1%, after a period of 30 days. However, the dry weight is maximum (0.235±0.049 g) at 5% OMW, however, there is no significant difference in the fresh and dry weights of the stems and leaves for different concentrations. In light of these results, the OMW of crushing units using the continuous three-phase process could be used as an irrigation source at concentrations below 7%, for better tomato yield.
2
Content available Physico-chemical analysis of sugar factory effluent stress on seedling growth of black gram (Vigna mungo (L.) Hepper) varieties
84%
Elayaraj B.
International Letters of Natural Sciences
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2014
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tom 12
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nr 1
EN
The physico-chemical parameters of the content in the effluents from Rajasree sugar factory of Villupuram district have been explored and its impact on the germination and growth patterns of black gram varieties has been studied. Physico-chemical parameters included color, odour, pH, temperature, electrical conductivity, suspended solids, dissolved solids, BOD, COD, chloride, sulphate, calcium, oil and grease concentration. Germination studies was conducted with black gram seed varieties (ADT-3, ADT-5, Vamban-3, Vamban-5 and Co-6) treated with different concentrations (control, 5, 10, 25, 50, 75 and 100 % ) of sugar mill effluent. Germination studies parameters such as germination percentage, germination index, shoot length, root length, fresh and dry weight of seedlings were found to be increased up to 10 % concentration of effluent. Vigour index, tolerance index, percentage of phytotoxicity and germination index were also calculated. The above mentioned parameters were decreased with the increase of effluent concentrations (25-100 %).
3
Content available Influence of GA3 and IAA and their frequency of application on seed germination and seedling quality characters
84%
Subash M. , Rafath H. , Lalitha J.
International Letters of Natural Sciences
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2015
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tom 03
EN
Effect of plant growth regulators on seed germination and seedling characters in terms of root length and shoot length. The seeds of sesame variety TVM – 1 were treated with different concentration of gibberlic acid (1.0, 2.0, 3.0 and 4.0 mg/l) and indole acetic acid (1.0, 2.0, 3.0 and 4.0 mg/l). From the results, it was observed that the GA3 and IAA at 2.0mg/l had regulatory effect on seed germination and seedling characters. Maximum germination, root length and shoot length was observed at 2.0mg/l in GA3 and 2.0mg/l in IAA than control. And GA3 at 2.0gm/l was found to be more efficient to modify seed germination and seedling characters when compared to IAA and control.
4
Study and preparation of an environmentally friendly corn seed coating agent
84%
Zeng D. , Mei X. , Wu J.
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tom 50
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nr 2
210-214
EN
Head smut of corn is caused by the fungus Sphacelotheca reiliana and occurs in northeast China and in regions of a similar climate. Yield losses due to the disease are variable and directly depend on the severity of the disease. The objective of this study was to produce a coating technology to protect corn from head smut and to avoid environmental pollution. Based on its excellent properties of high efficiency, nonpollution and nontoxicity, a novel seed coating agent was prepared with modified chitosan as the main material and trace elements and fertilizer as the auxiliary material. Compared with the conventional toxic seed coating agent, the novel seed coating agent protected the seeds and provided excellent control of head smut and increased yield by 11.6 to 14.6%, while the cost of seed coating agent decreased by 32.4%. Our findings indicate that the application of chitosan in seed coating technology had a remarkable effect on the resistance to head smut of corn and yield enhancement.
PL
Grzyb Sphacelotheca reiliana, sprawca głowni pylącej kukurydzy, występuje w północno-wschodnich Chinach oraz na terenach o podobnym klimacie. Straty plonu są zmienne, choć bezpośrednio zależą od nasilenia choroby. Przedmiotem badań było opracowanie technologii zaprawiania nasion przeciwko głowni kukurydzy. Bazując na doskonałych właściwościach chitozanu, jego wysokiej efektywności, nie zanieczyszczaniu środowiska oraz braku toksyczności, przygotowano nową zaprawę ze zmodyfikowanym chitozanem jako składnikiem podstawowym oraz śladowymi pierwiastkami i nawozem, pełniącymi rolę pomocniczą. W porównaniu do konwencjonalnej, toksycznej zaprawy, nowa zapewniała doskonałe zwalczanie głowni kukurydzy i powodowała wzrost plonu od 11,6 do 14,6%, podczas gdy koszt zaprawy był mniejszy o 32,4%. Wykorzystanie chitozanu w technologii zaprawiania nasion podnosi odporność kukurydzy na głownię oraz wpływa na wzrost plonu.
5
Content available Towards the propagation of a critically endangered tree species Anisoptera scaphula
84%
Hossain M. A. , Ferdous J. , Rahman M. A. , Azad M. A. K. , Shukor N. A. A.
Dendrobiology
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2014
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tom 71
EN
Anisoptera scaphula (Roxb.) Kurz, the tallest tree species in Bangladesh, is critically endangered worldwide due to its poor natural regeneration. This study describes the appropriate regeneration technique for A. scaphula through seed germination and clonal propagation by stem cutting. The fastest and highest germination percentage (65) was observed in dewinged seeds sown inverted orientation with half buried position (T10) followed by dewinged seeds (62.5%) sown horizontally in full buried (T7) and delayed germination with lowest percentage (15) was in control (T0). Optimum initial growth was also shown when seedlings were developed from the seeds under T7. Both winged and dewinged seeds sown vertically in full buried or half buried position produced curved seedlings. However, dewinged seeds sown in horizontal or inverted (winged side down) position produced otherwise i.e., straight seedlings. The highest rooting percentages (63%) and maximum number of root (4.8) per cutting were obtained when one node cuttings treated with 0.8% IBA solution followed by 0.4% IBA in turn affecting for better survival and growth of rooted cuttings in the nursery conditions.
6
Content available Physical and chemical induced mutagenesis study for identifying lethality dose in chick pea (Cicer arietinum L.) Var. Co - 4
84%
Umavathi S. , Mullainathan L.
International Letters of Natural Sciences
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2015
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tom 08
EN
The present study was conducted in order to determine the effect of gamma rays and EMS on seed germination, Seedling height and root length in chick pea to identify the lethal dose (LD50). In this regard, the healthy seeds of chick pea was subjected to different doses/concentrations of gamma rays (20, 30, 40, 50 and 60kR) and EMS (10, 20, 30, 40 and 50mM) for inducing mutation. The effect of gamma rays and EMS was determined by measuring the seed germination, seedling height and root length under the conditions of the M1 generation. The results shows that, the seed germination, seedling height and root length were significantly decreased with increasing doses/concentrations. The LD50 values were observed based on the growth reduction of seedlings after treatments with mutagen. The effective doses/concentrations which caused 50% growth reduction were observed in 40kR in gamma rays and 30mM in EMS.
7
Content available Effects of 660 nm laser irradiation of soybean seeds on germination, emergence and seedling growth
67%
Yuri S. , Jarbas C.
Acta Agrophysica
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2021
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tom 28
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