scholarly journals Effect of pre-sowing treatments and growing media on seed germination and seedling growth of Albizia lebbeck (L.) Benth

2018 ◽  
Vol 10 (3) ◽  
pp. 860-863
Author(s):  
Naresh Kumar ◽  
A. K. Handa ◽  
Inder Dev ◽  
Asha Ram ◽  
A. R. Uthappa ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Room Temperature ◽  
Cold Water ◽  
Hot Water ◽  
Albizia Lebbeck ◽  
Physical Dormancy ◽  
Growing Media ◽  
Hard Seed ◽  
Collar Diameter ◽  
Hard Seed Coat

The seeds of Albizia lebbeck have been observed to exhibit physical dormancy due to presence of hard seed-coat. To overcome this problem, the seeds were subjected to seven pre-sowing treatments viz., T1-immersion of seeds in cold water for 12 h; T2-immersion of seeds in cold water for 24 h; T3-immersion of seeds in hot water (100 °C) and subsequent cooling at room temperature for 12 h; T4-immersion of seeds in hot water (100 °C) and subsequent cooling at room temperature for 24 h; T5-immersion of seeds in cold water for 12 h followed by immersion in hot water (100 °C) and allowed to cool for 1 h; T6-immersion of seeds in cold water for 24 h followed by immersion in hot water (100 °C) and allowed to cool for 1 h. Untreated seeds served as control (T0). Treatment T3 gave highest germination (96%) which was comparable with T5 (95 %), T4 (94 %) and T6 (93%). Nine growing media viz., T1: soil,  T2: soil+sand (2:1), T3: soil+perlite (2:1), T4: soil+Farm Yard Manure (FYM) (2:1), T5: soil+vermicompost (2:1), T6: soil+sand+FYM (1:1:1), T7: soil+sand+vermicompost (1:1:1), T8: soil+perlite+FYM (1:1:1) and T9: soil+perlite+ vermicompost (1:1:1) were, also, studied for their effect on seedling growth of A. lebbeck. Among these media, maximum values of shoot length (23.82 cm), root length (21.14 cm), collar diameter (3.59 mm) and seedling quality index (0.350) were observed in T7.

scholarly journals Effect of Seed Size and Pretreatment Methods on Germination of Albizia lebbeck

ISRN Botany ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Edward Missanjo ◽  
Chikumbutso Maya ◽  
Dackious Kapira ◽  
Hannah Banda ◽  
Gift Kamanga-Thole
Keyword(s):  
Seed Size ◽  
Tree Species ◽  
Cold Water ◽  
Hot Water ◽  
Albizia Lebbeck ◽  
Hard Seed ◽  
Plant Parts ◽  
Seed Pretreatment ◽  
Multipurpose Tree Species ◽  
And Control

Albizia lebbeck is a multipurpose tree species prioritised for conservation in Malawi. The different plant parts are used in traditional medicine to treat different diseases. However, the seeds are dormant, and the tree species remain undomesticated. A study was conducted to evaluate the effect of seed size and presowing on the germination of Albizia lebbeck in a nursery. Seeds were grouped into four categories in regard to their length, small (≤0.5 cm), medium ( cm), large (≥0.8 cm), and mixture of small, medium, and large seeds. The seeds were subjected to five main seed pretreatment methods, namely, soaking in sulphuric acid for 2 minutes, nicking, soaking in hot water for 5 minutes, soaking in cold water for 24 hours, and control where seeds were sown without any treatment. The results indicate that combination of nicking and large seeds produced the highest (100%) germination. Hot water treatment was effective in large seeds producing 67.5% germination. The increased germination for mechanically scarified seeds through nicking suggests that seed dormancy in Albizia lebbeck is mainly due to its hard seed coat. Therefore, it is recommended to farmers to adopt use of nicking and large seeds, since it is safe and effective.

scholarly journals Effect of Seed Size and Different Pretreatment Methods on Germination of Albizia zygia (DC.) J. F. Macbr

2021 ◽  
Vol 25 (5) ◽  
pp. 815-818
Author(s):  
O.A. Iroko ◽  
S.O. Rufal ◽  
W.T. Wahab
Keyword(s):  
Water Treatment ◽  
Seed Size ◽  
Cold Water ◽  
International Market ◽  
Hot Water ◽  
Hot Water Treatment ◽  
Hard Seed ◽  
Seed Pretreatment ◽  
And Control ◽  
Hard Seed Coat

Albizia zygia produces valuable timber which has received some level of prominence in the international market. However, the seeds are dormant, and the tree species remain undomesticated. This study was conducted to evaluate the effect of seed size and presowing on the germination of Albizia zygia in a nursery. Seeds were grouped into four categories in regard to their length, small (≤0.5 cm), medium (> 0.5 < 0.8 cm), large (≥0.8 cm), and mixture of small, medium, and large seeds. The seeds were subjected to five main seed pretreatment methods, namely, soaking in sulphuric acid (H2SO4) for 2 minutes, mechanical scarification, soaking in hot water for 5 minutes, soaking in cold water for 24 hours, and control where seeds were sown without any treatment. The results indicate that combination of mechanical scarification and large seeds produced the highest (100%) germination. Hot water treatment was effective in large seeds producing 69.0% germination. The increased germination for mechanically scarified seeds suggests that seed dormancy in Albizia zygia is mainly due to its hard seed coat. Therefore, it is recommended to farmers to adopt use of mechanical scarification and large seeds, since it is safe and effective.

scholarly journals Seed anatomical studies on dormancy and germination in Chamaecrista absus

2016 ◽  
Vol 8 (2) ◽  
pp. 868-873
Author(s):  
H. M. Pallavi ◽  
K. Vishwanath ◽  
Bapurayagouda Patil ◽  
N. Naveen ◽  
Manjunath Thattimani
Keyword(s):  
Seed Coat ◽  
Hot Water ◽  
Boiling Water ◽  
Physical Dormancy ◽  
Anatomical Studies ◽  
Hard Seed ◽  
Artificial Seed ◽  
Germination Behaviour ◽  
Hilar Region ◽  
Hard Seed Coat

Present study was conducted to analyze the anatomical structure of seed to study the dormancy behaviour in Chamaecrista absus. Seed germination behaviour was also studied after breaking the seed dormancy by artificial seed treatments. The anotamical studies revealed that seed has apical hilar region and seed coat has four layers consisting of outer cuticle, sub cuticle, palisade layer and inner tegma leading to physical dormancy. Outer cuticle and sub cuticle layers are very hard to break naturally and hence seeds possess hard seed coat dormancy. This physically hard seed coat should be made soft to enhance germination. Studies to break dormancy were conducted involving treatments like hot water, hormones and in combinations of both. The results revealed that seeds dipped in boiling water made inner layers permeable for water absorption in hilar region and thus germination enhanced. In specific seeds treated with boiling water for 5 minutes recorded higher germination (82 %) over untreated control (26 %). . Other artificial treatments with hormones gibberellic acid (33 % ) and ethrel (34 % ) did not enhanced the germination significantly over control. C. absus has hard coat dormancy and can be overcame by treating seeds with boiling water treatment.

scholarly journals Effect of the seed coat on dormancy and germination in Stylosanthes humilis H. B. K. Seeds

2017 ◽  
Vol 39 (2) ◽  
pp. 114-122 ◽  
Author(s):  
Izabel de Souza Chaves ◽  
Nilo Cesar Queiroga Silva ◽  
Dimas Mendes Ribeiro
Keyword(s):  
Seed Coat ◽  
Room Temperature ◽  
Low Ph ◽  
Physical Dormancy ◽  
Hard Seed ◽  
Stylosanthes Humilis ◽  
Physiological Dormancy ◽  
Radicle Protrusion ◽  
Townsville Stylo ◽  
Hard Seed Coat

Abstract: Seed of Townsville stylo (Stylosanthes humilis H.B.K.) is known to exhibit a hard seed coat and when freshly harvested also show a physiological dormancy, however, the nature of the co-actions between seed coat and embryo growth that determine dormancy is poorly understood. In this study, physical dormancy of Townsville stylo seeds was not reduced during natural ageing at room temperature, in contrast to the physiological dormancy, which is gradually overcome during after-ripening. Furthermore, the permeability of seed coat was affected by scarification treatments as well as by low-pH solutions. Together, these data indicate that physical dormancy overcome of seed is prerequisite for radicle protrusion and physiological dormancy of Townsville stylo seeds contribute to its timing.

scholarly journals Microbial inoculant influences the germination and growth of Albizia lebbeck seedlings in the nursery

2016 ◽  
Vol 26 (1) ◽  
pp. 82-89
Author(s):  
B. M. Khan ◽  
M. A. Kabir ◽  
M. K. Hossain ◽  
M. A. U. Mridha
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Volume Index ◽  
Cow Dung ◽  
Albizia Lebbeck ◽  
Positive Role ◽  
Total Pigment ◽  
Vigor Index ◽  
Collar Diameter ◽  
Germination And Growth

Microbial inoculants (MI), a biofertilizer, composed of many different beneficial microorganisms has positive role on seed germination and growth of plants. In the present study, its efficacy on seed germination and seedling growth of Albizia lebbeck in the nursery was studied. The seeds were sown in polybags filled with a mixture of forest soil and cow dung (3:1) and treated with 0.1%, 0.5%, 1%, 2%, 5% and 10% concentrations of MI. Most of the parameters studied (seed germination, shoot and root lengths, dry weights of shoot and root, collar diameter, leaf number etc) were found maximum in 2% of MI . Although the highest vigor index, volume index and quality index (7053, 3738 and 1.106, respectively) were found in 2% MI, but the highest sturdiness (65.95) was found in 1% MI solution. The nodule number was higher at a very low (0.5%) concentration of MI but it normally decreased with the increase of concentration. Total pigment content in leaf was recorded highest (112.86 mg.L-1) in 2% of MI. Therefore, MI influences seed germination and seedling growth of A. lebbeck and the low concentration (2%) of the inoculant can be recommended for getting maximum seed germination and seedling growth of the species studied.Banko JanakariA Journal of Forestry Information for NepalVol. 26, No. 1, Page: 82-89, 2016

scholarly journals The Role of Pitch and Tempo in Sound-Temperature Crossmodal Correspondences

2017 ◽  
Vol 30 (3-5) ◽  
pp. 307-320 ◽  
Author(s):  
Qian (Janice) Wang ◽  
Charles Spence
Keyword(s):  
Room Temperature ◽  
Cold Water ◽  
Hot Water ◽  
Crossmodal Correspondences ◽  
Online Study ◽  
Fast Tempo ◽  
Potential Applications ◽  
Different Levels ◽  
Temperature Water

We explored the putative existence of crossmodal correspondences between sound attributes and beverage temperature. An online pre-study was conducted first, in order to determine whether people would associate the auditory parameters of pitch and tempo with different imagined beverage temperatures. The same melody was manipulated to create a matrix of 25 variants with five different levels of both pitch and tempo. The participants were instructed to imagine consuming hot, room-temperature, or cold water, then to choose the melody that best matched the imagined drinking experience. The results revealed that imagining drinking cold water was associated with a significantly higher pitch than drinking both room-temperature and hot water, and with significantly faster tempo than room-temperature water. Next, the online study was replicated with participants in the lab tasting samples of hot, room-temperature, and cold water while choosing a melody that best matched the actual tasting experience. The results confirmed that, compared to room-temperature and hot water, the experience of cold water was associated with both significantly higher pitch and fast tempo. Possible mechanisms and potential applications of these results are discussed.

scholarly journals Seed Breaking Dormancy Technique and Growth of Screw Tree (Helicteres isora Linn.) seedlings

2021 ◽  
Vol 9 (1) ◽  
pp. 43-58
Author(s):  
Nazhira Firda Yulia ◽  
◽  
Supriyanto Supriyanto ◽  
Diana Prameswari ◽  
◽  
...  
Keyword(s):  
Seed Coat ◽  
Hot Water ◽  
Water Cool ◽  
Hard Seed ◽  
Breaking Dormancy ◽  
Helicteres Isora ◽  
Npk Fertilizer ◽  
Tree Fruits ◽  
Hard Seed Coat ◽  
Tree Seed

Screw tree is a shrub from family Malvaceae that has many benefits in pharmacy. Screw tree seed has very hard seed coat, so the seed must be treated before germination. The aim of this research was to assess the characteristic of fruit and seeds, effect of seed breaking dormancy, and effect of NPK fertilizer dosage on the growth of screw tree (Helicteres isora) seedlings. The results indicated that screw tree fruits belong to dry fruits with capsule form and has 5 follicles that has different direction. Screw tree seed is orthodox type that has 9 ̶ 36 seeds in one follicle with triangle and square shape. Germination technique in laboratory with soaking the seeds in hot water 100oC until the water cool for 48 hours treatment produced the best germination amounting to 65.0%. Germination technique in green house with soaking the seeds in hot water 100oC until the water cool for 24 hours treatment was the best germination amounting to 77.0%. Seedlings fertilized with 1 g NPK doses increased screw tree growth in diameter parameter of 6.35 mm and shoot-root ratio parameter of 3.9 compared to control.

scholarly journals Pematahan Dormansi Benih Kebiul (Caesalphinia bonduc L.) dengan Berbagai Metode

Akta Agrosia ◽  
2016 ◽  
Vol 19 (2) ◽  
pp. 147-156
Author(s):  
Yesi Uyatmi ◽  
Entang Inoriah ◽  
Marwanto Marwanto
Keyword(s):  
Plant Height ◽  
Root Length ◽  
Germination Rate ◽  
Hot Water ◽  
Germination Capacity ◽  
Hard Seed ◽  
Randomized Design ◽  
Breaking Dormancy ◽  
Different Temperatures ◽  
Hard Seed Coat

Seed of Caesalpinia bonduc L. is difficult to germinate due to the thick and hard seed coat. The research aims to evaluate various methods for breaking dormancy of C. bonduc seed. This study was conducted from December to January 2016 The way to break the dormancy were arranged in Completely Randomized Design. Eleven methods to solve the seed dormancy of C. bonduc were compared. The ways to break the dormancy were soaking in water with different temperatures. The temperatures were 30C for 0 hours, 5 hours, 10 hours, and 15 hours. Other techniques to break the dormancy were soaking in hot water at 10000C for 5 hours, 10 hours, and 15 hours. Warm stratification with 100% air humidity (RH) at 40C for five days, ten days and 15 days also included as treatments. The last method was seed piercing with a needle. The variables observed in this study were germination capacity, germination rate, epicotyl length, plant height, and root length. The results of this study showed that the 11 methods of breaking seed dorman cy significantly affected germination capacity, germination rate, emerging epicotyl, and plant height. Seed piercing classified as the most efficient method as indicated by the value of 100% in germination capacity, 1.43 in germination rate, 13.64 cm in plant height, and 6.16 cm in root length.0

scholarly journals Propagation of threatened climber species Entada rheedii Spreng. – a medicinal plant with extremely thick and hard seed coat

Dendrobiology ◽  
2021 ◽  
Vol 85 ◽  
pp. 92-104
Author(s):  
Md. Aktar Hossain ◽  
Joyeta Dey ◽  
Mohammed Abdur Rahman
Keyword(s):  
Medicinal Plant ◽  
Growth Performance ◽  
Seed Coat ◽  
Dry Mass ◽  
Germination Percentage ◽  
Stem Cutting ◽  
Hard Seed ◽  
Collar Diameter ◽  
Survival And Growth ◽  
Hard Seed Coat

The study explored propagation techniques of Entada rheedii Spreng., a threatened medicinal climber species with extremely hard seed coat. Propagation trials included both pre-sowing treatments of seeds for germination and clonal propagation by stem cutting. Pre-sowing treatments included (a) soaking of both cut (notched) and uncut (intact) seeds in water for 0 h, 24 h, 48 h, and 72 h and (b) immersion of intact seeds in 5% acetone solution for 5 min, 10 min, and 20 min before sowing in germination media in polybags. On the other hand, stem cutting involved treating the summer or autumn cuttings with 0%, 0.4%, and 0.8% IBA solution before rooting in non-mist propagator. Notched seeds soaked in water for 48 h showed the fastest seed germination with the highest germination percentages (73.3) and better seedling growth in terms of plant height, collar diameter, leaf number and total dry mass followed by notched seeds soaked in water for 72 h. The slowest germination and the lowest germination percentage (3.3), as well as the poorest growth performance was for intact seeds without any treatment. The highest rooting percent­age with maximum number of roots (36.6) was obtained from the summer cuttings treated with 0.4% IBA solution followed by autumn cuttings with 0.8% IBA and the lowest (43.3% and 8.3 roots) was for summer cuttings in control. The factors also dictated the survival and growth performance of rooted cuttings in the nursery conditions. The outcomes of these trials i.e., notched seeds soaking in water for 48 h will help to enhance the propagation of this valuable medicinal plant species.

scholarly journals Chemical Applications, Scarification and Stratification Effects on Seed Germination of Rare Endemic Verbascum calycosum Hausskn. ex Murb. (Scrophulariaceae)

2018 ◽  
Vol 46 (2) ◽  
pp. 376-380 ◽  
Author(s):  
Muhip HİLOOĞLU ◽  
Emel SÖZEN ◽  
Ersin YÜCEL ◽  
Ali KANDEMİR
Keyword(s):  
Hot Water ◽  
Ex Situ ◽  
Cold Stratification ◽  
Endemic Plant ◽  
Physical Dormancy ◽  
Hard Seed ◽  
Physiological Dormancy ◽  
Endemic Plant Species ◽  
Water Treatments ◽  
Rare Endemic

Verbascum calycosum is an endemic plant species having considerable narrow distribution in Erzincan (Turkey) region. This species is known from only a single population and its habitats are highly threatened due to intensive human activities and soil erosion. In this study, the germination behavior of V. calycosum under different concentrations of NaCl, HCl, KNO3, GA3 (100 and 200 μM), hot-cold stratification and mechanical scarification were investigated. Seeds were exposed to a photoperiod of 8 h light/16 h dark with a 23/18 °C thermoperiod. Germination rates increased with GA3-100 µM (39%), GA3-200 µM (54.5%), mechanical scarification (34.5%) and cold stratification treatments (+4 °C, 23.25%; -20 °C, 18.25%) on the other hand, KNO3, NaCl, HCl and stratification with hot water treatments have decreased germination rates significantly when compared to the control (12.25%). Increased germination after GA3 application and mechanical scarification indicated that seeds of V. calycosum exhibited both non-deep and intermediate physiological dormancy as well as physical dormancy due to its hard seed coat. The highest speed of germination index was obtained at cold stratification of +4 °C and -20 °C (10.3). This study represents first report about seed dormancy and germination characteristics of V. calycosum. Overall, these results will provide valuable data for ex situ conservation of this rare endemic plant.

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