during dehydration stress ( Close, 1997 ; Danyluk et al., 1998 ; Peng et al., 2008 ; Rinne et al., 1999 ). Guava ( Psidium guajava L.), which belongs to the Myrtaceae family, is a small evergreen tree ( Morton, 1987a ; Yadava, 1996 ). Guava can
Guava (Psidium guajava L.) is an exceptional source of vitamin. C. It is also considered to be the most important cultivated species of the Myrtel family. Shoot tip and stem node were taken from seedling germinated in Murashige and Skoog medium (MS) and cultured in the same medium supplemented with 1-3mg/l benzylaminopurine (BA) and 0.1mg/l naphthaleneacetic acid (NAA) or 0.2-2mg/l thidiazuron (TDZ) and 0.1mg/l NAA. Multiple shoots (4-6) were obtained in 4-5 weeks from culture in 1-2mg/l BA and 0.1mg/l NAA, while TDZ caused abnormal shoot growth. Shoots were rooted successfully with 100% frequency in MS medium containing 2mg/l indolebutyric acid and further elongation of shoots was achieved in MS medium, supplemented with lg/l activated charcoal. Regenerated plantlets were successfully established in soil.
. Materials and Methods Fruit material. Freshly harvested guava ( Psidium guajava L. cv. Pedro Sato) was obtained from a commercial orchard located at Vista Alegre do Alto (lat. 48°21′ W, long. 21°10′ S), São Paulo State, Brazil, at maturity stage 1
Abstract
Guava fruit detachment force began to decline from 7 kg at 115 days after anthesis before the fruit had fully grown, to less than 0.5 kg by day 130. There was a parallel decline in deformation force from greater than 14 kg to less than 4 kg, loss of skin chlorophyll, and a decline in pulp titratable acidity from 18 to 10 meq/100 gm fresh weight. Mature fruit harvested on one occasion showed a range of detachment force from 0.5 to 7.2 kg, which correlated well with the ranges in measures of pulp quality and fruit maturity, total soluble solids, pH, titratable acidity, and skin color. Fruit detached with a force less than 4 kg were full yellow and had pulp with a pH 3.0, less than 16 meq/100 g fresh weight titratable acidity and 6° Brix total soluble solids.
significant difference (α ≤ 0.05). Results and Discussion Among the 86 species tested, nine ( Osmunda japonica , Selaginella tamariscina , Davallia mariesii , Polypodium formosanum , Psidium guajava , Lavandula spp., Pteris dispar , Pteris
and non-climacteric fruit and vegetables HortScience 43 106 111 Jain, N. Dhawan, K. Malhotra, S. Singh, R. 2003 Biochemistry of fruit ripening of guava ( Psidium guajava L.): Compositional and enzymatic changes Plant Foods Hum. Nutr. 58 309 315
Abstract
‘Bassateen Edfina’, a new cultivar of guava (Psidium guajava L.), is characterized by its higher yield and better fruit quality than the parent stock ‘Bassateen El Sabahia’.
Abstract
‘Ka Hua Kula’ (“golden fruit” in Hawaiian) guava (Psidium guajava L.) has been released by the Department of Horticulture to fill the need of a better cultivar for processing guava puree.
Abstract
Flower buds of guava (Psidium guajava L.) are invariably borne on newly emerging axillary or terminal vegetative growth. Any cultural manipulation that will induce the development of this growth will ultimately result in fruit set. Defoliation with urea brings about “instantaneous” flowering and subsequent fruit setting.