EFFECT OF PRESOWING CHEMICAL TREATMENT ON GERMINATION AND SEEDLING GROWTH IN<i>ACACIA NILOTICA</i>

Palani, M.; Dasthagir, M. G.; Kumaran, K.

doi:10.1080/01435698.1995.9752945

Cited by 15 publications

(11 citation statements)

References 2 publications

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“…For thermo-dormancy, seeds need exposure to a temperature regime that is often different from that required for definite germination process. Thermo-dormancy can be partially or completely overcome by chemical treatments in some cases (Palani et al, 1995). Seed treatment by soaking in stagnant or running water can leach out chemical inhibitors in fruits and seeds (Yadav, 1992) In Bangladesh, Albizia richardiana and Lagerstroemia speciosa are widely used in home gardening and road-side plantation both for public and private greening programs.…”

Section: Introductionmentioning

confidence: 99%

Do pre-sowing treatments affect seed germination in Albizia richardiana and Lagerstroemia speciosa?

Azad

Paul

Matin

2010

Front. Agric. China

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In this paper, seed morphology and effects of pre-sowing treatments were studied. Matured seeds of the species were collected from healthy trees in the National Botanical Garden, Bangladesh, and treated with five presowing treatments. The average length, breadth and thickness were found to be 0.56AE0.03 cm, 0.44AE0.009 cm and 0.26AE0.008 cm in Albizia richardiana King and Prain, and 1.32AE0.02 cm, 0.55AE0.04 cm and 0.11AE0.002 cm in Lagerstroemia speciosa L., respectively. Germination was carried out in polybags with a mixture of topsoil, coconut husk compost, coarse sand and fine sand in a ratio of 3∶4∶1∶1. Results revealed that the germination rates of seeds in different pre-sowing treatments were significantly increased compared to those in cold-water treatment in both species. The highest germination rate was found to be 96% in hot-water treatment followed by 87%, 83% and 49% in treatments with scarification, H 2 SO 4 and control in A. richardiana, respectively. However, the highest germination rate (79%) was found in H 2 SO 4 treatment followed by 64%, 62% and 25% in treatments with hot water, scarification and control in L. speciosa, respectively. The lowest germination (35% in A. richardiana and 20% in L. speciosa) was found in cold-water treatment in both cases. Analysis of variance (ANOVA) showed the significant difference among the treatments for both species. It is concluded that hot-water treatment is recommended for seed germination of both species in rural Bangladesh.

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Section: Introductionmentioning

confidence: 99%

Do pre-sowing treatments affect seed germination in Albizia richardiana and Lagerstroemia speciosa?

Azad

Paul

Matin

2010

Front. Agric. China

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“…Si bien es conocido que el KNO 3 incrementa la germinación de numerosas especies cuando se combina con otros factores (Vincent & Roberts, 1977;Bewley & Black, 1994;Kigel & Galili, 1995;Palani, et al, 1995;Carvalho & Nakagawa, 2000) y es recomendado por las Reglas Internacionales para el Análisis de Semillas (ISTA, 2003) y por las Regras para Análise de Sementes (Brasil, 1992) para la superación de la dormancia, la velocidad de germinación de las semillas de P. cuneatum tratadas con esta sal, aunque mayor a la alcanzada por las semillas escarificadas, no alcanzó a superar aquella de las semillas sin tratamiento. Petit & Blanco (2000) encontraron resultados similares con semillas de P. caudatum tratadas con agua hirviendo o SO 4 H 2 , las cuales no superaron el porcentaje de germinación alcanzado por las semillas sin tratamiento.…”

Section: Resultados Y Discusiónunclassified

Madurez fisiológica, germinación y conservación de semillas de guayabito (Psidium cuneatum Camb. - Myrtaceae)

Otegui

Sorol

Fleck

et al. 2007

Rev. bras. sementes

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RESUMEN -Psidium cuneatum Camb., "guayabito o arasá blanco" es una especie nativa de la provincia de Misiones y norte de Corrientes que tiene importancia ecológica y potencial interés comercial. Actualmente está afectada por el avance de la forestación comercial. El objetivo de este trabajo fue analizar el comportamiento germinativo de sus semillas según la madurez de los frutos, las condiciones de germinación y el almacenamiento en diferente ambientes. En individuos marcados y observados semanalmente durante 2 años, se estableció que la fructificación se produce desde diciembre a julio y que los frutos persisten en el árbol durante un período prolongado antes de dispersarse. La germinación de semillas procedentes de frutos de diferentes tamaños, evaluada a través del índice de velocidad de germinación y del porcentaje de germinación permitió determinar que las semillas procedentes de frutos con diámetro mayor a 1.5 cm exhiben mejor comportamiento germinativo, por lo que el tamaño del fruto es un buen indicador de madurez en esta especie. Por otra parte, se estudió el efecto que el régimen de temperatura tiene sobre la germinación, comprobándose que a 27ºC el porcentaje y la velocidad de germinación fueron significativamente superiores. Para establecer las condiciones para la conservación de las semillas se procedió a almacenarlas durante 30, 90, 180, y 270 días, combinando tipo de recipiente y temperatura. Se comprobó que el envase hermético fue más efectivo para la conservación del poder germinativo cuando se utilizó a baja temperatura, aunque se comprobó una reducción acentuada del poder germinativo, el cual fue de 32% a los 180 días.Términos para indexación: Temperatura de germinación, período de almacenamiento, tamaño de frutos. PHYSIOLOGICAL MATURITY, GERMINATION AND CONSERVATION OF GUAYABITO (Psidium cuneatum CAMB. -MYRTACEAE) SEEDSABSTRACT -Psidium cuneatum Camb., "guayabito or arasá blanco" is a species native to the Misiones province and the north of Corrientes, where it is of ecological importance and a potential commercial interest. This species is currently affected by the advance of commercial forestations. The aim of this study was to analyze the germinative behaviour of seeds of this species according to the maturity of the fruits, the germinative conditions and storage under different environments. A few trees were labelled and submitted to weekly observations for two years. It was established that fructification takes place from December to July and the fruits remain on the trees during a long period before they fall off. The germination of seeds from fruits of different sizes, which was assessed by means of the velocity index and germinative percentage, showed that the seeds of fruits with diameter larger than 1.5 cm performed better, so that the fruit size is an appropriate indicator of maturity in this species. On the other hand it was confirmed that 27 ºC is the best temperature for germination percentage and velocity. To establish the best conditions for conserving the seeds, they were sto...

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“…KNO 3 is frequently used as germination stimulant both in connection with testing (ISTA 2001) and in operational plant propagation. KNO 3 had a strong effect on both germination percentage and vigour on Acacia nilotica seeds pretreated with acid (Palani et al 1995). At 1% concentration, germination increased from 37 (control) to 79%, and at 2% concentration it increased to 85%.…”

Section: Growth Regulatorsmentioning

confidence: 91%

“…Comparative studies on the effect of different germination stimulants have been carried out on seeds of Ziziphus mauritiana (Murthy and Reddy 1989), Casuarina equisetifolia (Maideen et al 1990) and Acacia nilotica (Palani et al 1995). In Ziziphus mauritiana, thiourea proved the most effective germination stimulant; 24-h soaking in a 1% solution increased the total germination percentage from 41 (control) to 78% at 30°C (optimal germination temperature).…”

Section: Growth Regulatorsmentioning

confidence: 99%

Tropical Forest Seed

Schmidt¹

2007

Tropical Forestry

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PrefaceThe role and perception of forests in tropical areas has changed drastically during the last half century. Natural forests, as resources for forest products, are dwindling. Sustainable management of natural forests faces many difficulties in practice, although progress has been made. However, rural people in tropical countries often experience that the forests, which were previously the buffer for agriculture and an important resource, are becoming more and more inaccessible. Remaining forests are to a large extent protected, degraded or so far away from settlement that in practice they are beyond reach. The majority of the world's forest products in the future will come from manmade plantations and cultivated trees. The term 'plantation' , usually referring to traditional block plantings of industrial species, is acquiring a wider meaning which includes, for example, smaller woodlots, shelterbelts and various types of agroforestry. Forest seeds are in this context of utmost importance. Not only are seeds the most commonly used propagation material, they are also the carriers of the genetic material from one generation to the next. Forest seed handling is thus an integrated part of selection, management, development and conservation of forest genetic resources in a larger context. With this in mind, and considering how self-evident the matter of seed quality is in agriculture, one can wonder how little attention has been and is given to forest germplasm in many afforestation and plantation programmes. The fact that seeds are small, seemingly ubiquitous and that the result of using good or poor seed will only become apparent far in the future tends to induce low priority or ignorance. The sad observation is that not only are forests degrading and dwindling at an alarming rate, but even the basis for reestablishment, good genetic material, is vanishing. For many species it is getting increasingly difficult to find 'good' seed.Among potential afforestation or plantation species, relatively few exhibit major seed physiological problems. Yet many are not used because of alleged seed problems, problems that could easily be overcome by a little more careful handling during collection and subsequent procedures. Some tree seeds are difficult, or at least appear to be so, because they behave differently from what we expect. Systematic research has shown ways to overcome many practical problems. It has also shown that some features such as desiccation sensitivity and short viability are inert, and we must adapt our practices to these, e.g. using seed quickly if it cannot be stored.The basic philosophy of this book is that good forestry practice should never be impeded by failure to get access to good-quality seed, and that the solution to possible seed problems is not to use poor seed or 'easy' species, but to improve and develop seed handling practices.

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EFFECT OF PRESOWING CHEMICAL TREATMENT ON GERMINATION AND SEEDLING GROWTH INACACIA NILOTICA

Cited by 15 publications

References 2 publications

Do pre-sowing treatments affect seed germination in Albizia richardiana and Lagerstroemia speciosa?

Do pre-sowing treatments affect seed germination in Albizia richardiana and Lagerstroemia speciosa?

Madurez fisiológica, germinación y conservación de semillas de guayabito (Psidium cuneatum Camb. - Myrtaceae)

Tropical Forest Seed

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