Germination and growth inhibitory sesquiterpene lactones and a flavone from Tithonia diversifolia

Baruah, N.; Sarma, Jadab C.; Barua, Nabin C.; Sarma, S. K.; Sharma, Ram Prakash

doi:10.1016/s0031-9422(00)97006-7

Cited by 75 publications

(57 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Vegetative reproduction allows it to occupy a temporary site quickly while light seeds produced by sexual reproduction allow distance dispersal to new sites. Reported allelopathic effects [2,15], such as secretion of compounds from the roots or leaching from the leaves that APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 3 (1) The large heavier seeds of T. rotundifolia implies that its embryo is large and that it carries large food reserves. The large embryo and large food reserves of the seed make it possible for the seedlings to emerge as a more completely developed plantlet, survive for longer and grow to a more aggressive size in an environment that is starved of resources.…”

Section: Discussionmentioning

confidence: 99%

Seed Germination and Reproductive Strategies of Tithonia Diversifolia (Hemsl .) Gray and Tithonia Rotundifolia (P.M) Blake

Muoghalu¹

2005

Appl Ecol Env Res

View full text Add to dashboard Cite

Abstract. Seed germination and reproductive strategies of Tithonia diversifolia and Tithonia rotundifolia, two invasive species introduced into Africa from North and Central America, were studied. The aim was to determine the characteristics that make them invasive species in the continent. Tithonia diversifolia is a perennial and polycarpic plant reproducing both sexually and asexually while Tithonia rotundifolia is an annual monocarpic plant reproducing only sexually. The seeds of these species exhibit a period of dormancy before germinating. Tithonia diversifolia produces small sized light and numerous seeds while Tithonia rotundifolia produces larger sized, heavier and fewer seeds. Tithornia rotundifolia allocates a high proportion of of dry matter (41.6 %) and Tithonia diversifolia low proportion (10.5 %) to reproduction. It is concluded that small sized light and numerous seeds produced by Tithonia diversifolia accounts for its wide dispersal and rapid spread in colonized areas. Also its perennial habit and ability to reproduce sexually and vegetatively accounts for the species colonizing and stabilizing fast in new habitats. While the larger heavier seeds and high reproductive effort of Tithonia rotundifolia ensures its early vigorous start in seedling growth, quick establishment, survival for longer and to grow to more aggressive size in an environment that is starved of resources. Seed dormancy exhibited by the two species ensures they survive adverse conditions in their environment as seeds and germinate only when the environmental conditions favour the survival of their seedlings.

show abstract

Section: Discussionmentioning

confidence: 99%

Seed Germination and Reproductive Strategies of Tithonia Diversifolia (Hemsl .) Gray and Tithonia Rotundifolia (P.M) Blake

Muoghalu¹

2005

Appl Ecol Env Res

View full text Add to dashboard Cite

show abstract

“…Bioactive terpenoids, especially the monocyclic sesquiterpene α-caryophyllene, were found in an ethanolic extract of Pteris tripartita (Baskaran and Jeyachandran, 2010). Sesquiterpenes form a significant group of secondary metabolites and have a varied range of medicinal activity, including anticancer, anti-inflammatory, cytotoxic, plant growthregulatory, and antimicrobial properties (Baruah et al, 1994).…”

Section: Phytochemicals Of Ferns and Their Distribution In Other Planmentioning

confidence: 99%

A review of the use of pteridophytes for treating human ailments

Xavier-ravi

Vigila

Zhang

et al. 2018

J. Zhejiang Univ. Sci. B

View full text Add to dashboard Cite

Abstract:The aim of this review was to explore the pharmacological activity of early tracheophytes (pteridophytes) as an alternative medicine for treating human ailments. As the first vascular plants, pteridophytes (aka, ferns and fern allies) are an ancient lineage, and human beings have been exploring and using taxa from this lineage for over 2000 years because of their beneficial properties. We have documented the medicinal uses of pteridophytes belonging to thirty different families. The lycophyte Selaginella sp. was shown in earlier studies to have multiple pharmacological activity, such as antioxidant, anti-inflammatory, anti-cancer, antidiabetic, antiviral, antimicrobial, and anti-Alzheimer properties. Among all the pteridophytes examined, taxa from the Pteridaceae, Polypodiaceae, and Adiantaceae exhibited significant medicinal activity. Based on our review, many pteridophytes have properties that could be used in alternative medicine for treatment of various human illnesses. Biotechnological tools can be used to preserve and even improve their bioactive molecules for the preparation of medicines against illness. Even though several studies have reported medicinal uses of ferns, the possible bioactive compounds of several pteridophytes have not been identified. Furthermore, their optimal dosage level and treatment strategies still need to be determined. Finally, the future direction of pteridophyte research is discussed.

show abstract

“…Se ha señalado algunos compuestos en el botón de oro con propiedades alelopáticas. Baruah et al (1994) determinaron los efectos inhibitorios de dos lactonas sesquiterpénicas tagitinina A y tagitinina C y un flavonoide hispidulina aislados de T. diversifolia sobre la germinación de semillas de rábano, pepino y cebolla. El flavonoide hispidulina fue más tóxico para las semillas de los cultivos evaluados y la actividad de tagitinina C fue más débil que la de tagitinina A y la hispidulina.…”

Section: Tablaunclassified

Allelopathic effects of aqueous extracts of leaves of tree marigold (Tithonia diversifolia (Hemsl.) A. Gray) on seed germination and seedling growth of lettuce (Lactuca sativa L.)

Garsaball

Natera

2013

Sci. agropecu

View full text Add to dashboard Cite

Recibido 23 abril 2013; Aceptado 10 septiembre 2013. ResumenAlgunos compuestos químicos liberados por las plantas tienen la capacidad de controlar la presencia de otras plantas en su entorno tanto de su propia especie como de otras, la alelopatía es un factor de importancia en la regulación de la estructura de las comunidades vegetales, resultando crucial para un apropiado desarrollo agrícola un mejor entendimiento de estas relaciones. La investigación tuvo por objeto determinar los efectos de extractos acuosos del follaje del botón de oro (Tithonia diversifolia) sobre germinación de semillas y crecimiento de plántulas de lechuga (Lactuca sativa L.), cultivar Parris Island. Se preparó un extracto al 15 % p/v con hojas de plantas de botón de oro, se dejó reposar por 48 h y luego se obtuvo por dilución extractos al 0,5; 1,0; 1,5 y 2,0 % p/v evaluándoseles pH y conductividad eléctrica (S.cm -1 ). La siembra se realizó en bandejas cubiertas con una doble capa de papel absorbente sobre la que se colocó 25 semillas/bandeja. Fueron regadas dos veces diarias con los extractos foliares. El tratamiento control recibió agua corriente. El diseño estadístico fue bloques completos al azar con cuatro repeticiones. La cosecha de las plántulas se efectuó a los 14 días después de la siembra. El pH disminuyó y la conductividad eléctrica se incrementó con los aumentos en la concentración de los extractos foliares. La germinación se vio afectada negativamente por los extractos. Se demostró un efecto reductor sobre el crecimiento general de las plántulas de lechuga. Palabras clave: Alelopatia, extractos acuosos, hojas, Tithonia diversifolia, Lactuca sativa. AbstractSome chemical compounds released by plants can to control the presence of other plants in their environment both of their own species and different ones, allelopathy is an important factor in regulating the structure of plant communities, a better understanding of these relationships is critical for appropriate agricultural development. The objective was to determine the effects of aqueous extracts of leaves of tree marigold (Tithonia diversifolia) on seed germination and seedling growth of lettuce (Lactuca sativa L.) cultivar Parris Island. A 15% w/v extract was prepared with leaves of tree marigold gold, it was allowed to stand for 48 h. After, diluting extracts at 0.5, 1.0, 1.5 and 2.0% w/v were obtained and pH and electrical conductivity (S.cm -1 ) were determined. Sowing was carried out in trays covered with a double layer of absorbent paper on which were placed 25 seeds/tray. Irrigation was applied twice per day using leaf extracts. The control treatment received tap water. A randomized complete block design was used with four replications. Seedlings were harvested at 14 days after sowing. pH decreased and electrical conductivity increased with increases in the concentration of leaf extracts. The germination was negatively affected by extracts. A lowering effect was observed on the overall growth of lettuce seedlings.

show abstract

Germination and growth inhibitory sesquiterpene lactones and a flavone from Tithonia diversifolia

Cited by 75 publications

References 13 publications

Seed Germination and Reproductive Strategies of Tithonia Diversifolia (Hemsl .) Gray and Tithonia Rotundifolia (P.M) Blake

Seed Germination and Reproductive Strategies of Tithonia Diversifolia (Hemsl .) Gray and Tithonia Rotundifolia (P.M) Blake

A review of the use of pteridophytes for treating human ailments

Allelopathic effects of aqueous extracts of leaves of tree marigold (Tithonia diversifolia (Hemsl.) A. Gray) on seed germination and seedling growth of lettuce (Lactuca sativa L.)

Contact Info

Product

Resources

About