Seed Storage and Germination Performance in Knema attenuata - an Endemic Medicinal Tree of Western Ghats, India

2021 ◽  
Vol 27 (3) ◽  
pp. 162-166
Author(s):  
Abdul Azeez Hussain ◽  
◽  
Ramachandra Kurup Rajvikraman ◽  
Keyword(s):  
Seed Germination ◽  
Relative Humidity ◽  
Moisture Content ◽  
Seed Bank ◽  
Tree Species ◽  
Western Ghats ◽  
Climatic Condition ◽  
Seed Storage ◽  
Medicinal Tree

Detailed study on seed storage and germination trailed in Knema attenuata (Wall. ex Hook. f. & Thomson) Warb.– the IUCN Red Listed ‘least concern’ medicinal tree species revealed that seeds were of recalcitrant nature. Viability of the seeds could be maintained for a longer period of up to 6 months with 47% Moisture content (mc) when kept in closed polycarbonate bottles at seed bank condition [20±20C Temp. and 40% Relative Humidity (RH)]. The 55% seed germination under normal climatic condition could be enhanced to a much higher percentage (75±5) inside the mist house chamber (34±30C Temp. and 70-80% RH).

scholarly journals Conservation of Garcinia imberti Bourd. through seeds

2019 ◽  
Vol 6 (2) ◽  
pp. 243-251
Author(s):  
M Anto ◽  
M Angala ◽  
P S Jothish ◽  
C Anilkumar
Keyword(s):  
Seed Germination ◽  
Relative Humidity ◽  
Moisture Content ◽  
Gibberellic Acid ◽  
Biosphere Reserve ◽  
Seed Storage ◽  
Seed Moisture Content ◽  
Evergreen Forests ◽  
Seed Moisture ◽  
Subsequent Exposure

Garcinia imberti seeds were collected during 2015-2017 from Shangili, Cheenikkala and Bonaccord evergreen forests of Agasthyamala Biosphere Reserve, the only abode of this endangered endemic species. Germinability of seeds were analysed through decoating, Gibberellic acid (GA3) and light inductive pre-treatments on fresh (62.8 % moisture content; MC) and desiccated (fast; 23.3% MC and slow; 30.5 % MC) seeds. The seed germination with impermeable coat (0.7-1.2 mm) was restricted which on decoating got enhanced. Application of GA3 along with exposure to light breaked dormancy within 4-6 days compared to non-treated seeds that took 238-254 days to germinate. Stored seeds behaviour revealed that seed moisture content and rate of germination were negatively correlated. Seed storage was found to be more efficient only up to 80 days at controlled seed banking conditions (20 ± 20C, 20 % relative humidity; RH). Both fast and slow desiccated seeds stored for 60 days in seed bank conditions exhibited 50.4 and 43.4 % of germination compared 39.4% germination of non-desiccated seeds. Hence fast desiccated and decoated G. imberti seeds pre-treated with GA3 on subsequent exposure to light alleviated dormancy. For seed banking, fast desiccated seeds with MC in between 40-20% are found to be promising.

scholarly journals Seed germination studies on Gymnacranthera canarica (King) Warb. - a Vulnerable tree species of a highly threatened Myristica swamp ecosystem

2016 ◽  
Vol 8 (7) ◽  
pp. 9009 ◽  
Author(s):  
K. Keshavachandra ◽  
G. Krishnakumar
Keyword(s):  
Seed Germination ◽  
Moisture Content ◽  
Tree Species ◽  
Western Ghats ◽  
Initial Moisture Content ◽  
Moisture Level ◽  
Critically Endangered ◽  
Ecosystem Studies ◽  
And Storage ◽  
The Western Ghats

Gymnacranthera canarica (King) Warb. is an exclusive Myristica swamp species endemic to the Western Ghats.  The Myristica swamp is a Critically Endangered ecosystem.  Studies were carried out to assess the viability, germination and storage behaviour of Gymnacranthera canarica seeds.  In the present study, it was observed that seeds have shown an initiation of germination after two weeks.  A maximum of 90% germination was recorded when the initial moisture content was 38.04 ± 1.75 %.  A decreased percentage (3%) was observed when the moisture content reached 14.26 ± 2.3 after 70 days of storage.  Seeds failed to germinate beyond this moisture level.  A desiccation study showed recalcitrant behaviour and seeds can be stored in lab conditions for up to two and half months.

Seed storage behaviour and seed germination in African and Malagasy baobabs (Adansonia species)

2006 ◽  
Vol 16 (1) ◽  
pp. 83-88 ◽  
Author(s):  
Juvet Razanameharizaka ◽  
Michel Grouzis ◽  
Didier Ravelomanana ◽  
Pascal Danthu
Keyword(s):  
Seed Germination ◽  
Moisture Content ◽  
Seed Storage ◽  
The Other ◽  
Arid Zones ◽  
Physical Dormancy ◽  
Interspecific Differences ◽  
Wet Forests

The Adansonia (baobab) genus comprises seven species in Africa, six of which are endemic to Madagascar. Depending on the species, baobabs develop in widely varying ecosystems, including arid zones and savannahs, as well as dry and wet forests. Seeds from all species exhibited orthodox behaviour, tolerating dehydration to a moisture content of around 5%. There was no physical dormancy in the two species belonging to the Brevitubae section, A. grandidieri and A. suarezensis. Their seeds germinated without any prior scarification. The five other species, belonging to Adansonia and Longitubae section, have seeds with water-impermeable coats. In the case of A. digitata and A. za, the proportion of water-impermeable seeds was around two-thirds, whereas with A. rubrostipa, A. madagascariensis and A. perrieri, the proportion was >90%. Treatments allowing for the removal of physical dormancy needed to be markedly more severe with A. madagascariensis than with the other species. None the less, it seems impossible to link these characteristics and the interspecific differences to a strategy for adaptation by these species to their environment.

scholarly journals Seed Germination of Enterolobium contortisiliquum (Vell.) Morong. (Fabaceae) under Different Temperatures and Drying Method

2021 ◽  
pp. 54-59
Author(s):  
Natália Marinho Silva Crisóstomo ◽  
Lorraynne Gabrielly Vieira dos Santos ◽  
Luan Danilo Ferreira de Andrade Melo ◽  
João Luciano de Andrade Melo Junior ◽  
Larice Bruna Ferreira Soares ◽  
...  
Keyword(s):  
Seed Germination ◽  
Moisture Content ◽  
Tree Species ◽  
Wood Quality ◽  
Initial Moisture Content ◽  
Drying Method ◽  
Plant Propagation ◽  
Agricultural Engineering ◽  
Fluorescent Lamps ◽  
Different Temperatures

Enterolobium contortisiliquum (Vell.) Morong a tree commonly known as anglerfish, monkey ear and timbaúva. Due to its wood quality, this tree species is widely used in naval and civil constructions, toys and furniture frames, and can also be used for urban afforestation and restoration of degraded areas. The objective of this work was to standardize the best temperature conditions for conducting the germination tests of E. contortisiliquum seeds under laboratory conditions, considering the fact that the seeds come from coastal tropical Brazil, and to evaluate the desiccation tolerance. The experiments were carried out at the Plant Propagation Laboratory of the Agricultural Engineering and Sciences Campus (CECA) of the Federal University of Alagoas (UFAL), located in the municipality of Rio Largo, Alagoas, Brazil. The design of the experiment was fully randomized, with four repetitions of 25 seeds per treatment. In test I: The newly harvested seeds were subjected to constant temperatures of 5, 10, 15, 20, 25, 30, 35 and 40ºC and alternating temperatures of 20-30ºC, with an eight-hour photoperiod, simulated by four fluorescent lamps 20W daylight type. In trial II: The seeds were divided into two lots. The first was the control (initial moisture content). The second was subjected to slow drying on silica gel. A constant temperature of 30ºC is recommended for the germination and vigor test of E. contortisiliquum seeds. The critical means water content for seeds of this species is below 5%.

Microfloral infection and quality deterioration of sunflower seeds as affected by temperature and moisture content during storage and the suitability of the seeds for insect or mite infestation

1993 ◽  
Vol 73 (1) ◽  
pp. 303-313 ◽  
Author(s):  
N. D. G. White ◽  
D. S. Jayas
Keyword(s):  
Fatty Acids ◽  
Seed Germination ◽  
Moisture Content ◽  
Free Fatty Acids ◽  
Sunflower Seed ◽  
Fungal Growth ◽  
Seed Storage ◽  
Fungal Species ◽  
Sunflower Seeds ◽  
Ground Seed

Sunflower seed, cultivar Interstate 7111, was stored at 10, 20, 30, and 40 °C and 35, 45, 55, and 75% RH for up to 12 mo. At 75% RH fungal growth was extensive and free fatty acids (FFA) increased rapidly under all temperature regimes. Based on a threefold increase in FFA (1.5%) seed can be stored for 12 mo: at 6% moisture content (MC) and 30 °C; 7% MC and 20 °C; or 8% MC and 10 °C. Seed germination remained above 80% for 12 mo at 10 and 20 °C and 35, 45, and 55% RH; it declined to 70% at 30 °C and 45% RH, but at 55% RH it fell to 30% at 6 mo and 0% at 12 mo. Seed germination decreased rapidly at 40 °C. The incidence of microfloral infection by Penicillium spp. and Aspergillus spp. directly affected increased FFA, decreased germination, and infection was frequent at > 75% RH and different fungal species predominated at different temperatures. Eight species of stored-product beetles and one species of mite were placed on whole sunflower seed, ground seed, shells, or seed meat. Only Oryzaephilus surinamensis, O. mercator, Tribolium castaneum, and T. confusum multiplied appreciably in 2 mo, mainly on ground seed or seed meat. The Oryzaephilus spp. multiplied as much on sunflower seed as on ground wheat controls. Infestation of sunflower seeds by these pests is likely. Key words: Sunflower seed, storage, free fatty acids, germination, fungi, Insecta, Acari

scholarly journals Effect of Humidity, Temperature, and Scarification during Storage on Seed Germination of Lupinus havardii and L. texensis

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 476E-476
Author(s):  
Katherine L. Vasquez ◽  
Wayne A. Mackay
Keyword(s):  
Seed Germination ◽  
Relative Humidity ◽  
Filter Paper ◽  
Seed Storage ◽  
Important Species ◽  
Under Five ◽  
Seed Germinability ◽  
Commercially Important ◽  
Petri Dishes ◽  
Two Temperature

Lupinus havardii and L. texensis are two commercially important species of lupines (bluebonnets) in Texas. There is no current information for the storage requirements of these two bluebonnet species seeds. A study was undertaken to examine the effects of relative humidity, temperature, and scarification on seed germinability. Seeds of the two bluebonnet species were stored under five relative humidity treatments (11%, 23%, 52%, 75%, and 95%) and two temperature treatments (3°C or 22°C) either scarified or nonscarified in factorial combination. Seed samples were removed monthly. Nonscarified seed were scarified and all seed were placed in a seed germination chamber and germinated in petri dishes containing moistened filter paper. All samples of seed stored under 95% relative humidity were lost to seed-borne contamination. Germinability of scarified seed of both species decreased within 5 months in the 22°C/75% RH treatment. Other treatments had no effect on germinability during 7 months of seed storage.

scholarly journals Evaluation of Temperature and Moisture Content during Storage on the Germination of Flowering Annual Seed

HortScience ◽  
1995 ◽  
Vol 30 (5) ◽  
pp. 1003-1006 ◽  
Author(s):  
William J. Carpenter ◽  
Eric R. Ostmark ◽  
John A. Cornell
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Seed Storage ◽  
Seed Moisture Content ◽  
Moisture Contents ◽  
Seed Moisture ◽  
Storage Temperatures

Various combinations of temperature and moisture contents were used in evaluating the seed storage of nine genera of annual flowers. Relative humidity (RH) levels of 11%, 32%, 52%, and 75% provided wide ranges in seed moisture during storage at 5, 15, and 25C. At each temperature, total germination percentages (G) generally declined as seed moisture content increased during storage. The seed moisture range giving the highest G after 12 months of storage was determined for each temperature and plant genus. For all genera, seed moisture contents during storage increased as storage temperatures increased at constant RH levels. Moisture contents at 25C storage were 37%, 34%, 29%, and 20% higher than at 5C when RH levels were at 11%, 32%, 52%, and 75%, respectively.

Sign in / Sign up

Export Citation Format

Share Document