pyrus is the opening form
Answers
Answer:
Pyrus offers user-defined fields, system fields, form annotation fields, and ... Now a manager can click on the Form field when they open a client request, ...
Required form step: If enabled, this field is mandatory and the user cannot save or a...
Title: Field title displayed on the form. Examples: Purpose of Payment, Payment Date, ...
Description: A hint on what to enter in the field.
Answer:
Pear (Pyrus spp.) is one of the most widespread fruits with considerable economic and health values. Mourgues et al. (1996) established an efficient and reproducible method for genetic transformation of pear using A. tumefaciens using leaves of in vitro-raised plants. Up to 42% of inoculated leaves produced transformed buds or bud clusters. The transgenic plants could be successfully acclimatized in the glasshouse. Subsequently, several researchers successfully transformed different explants of pear and determined critical factors affecting the transformation. Kaneyoshi et al. (2001) reported a method for A. tumefaciens-mediated transformation of cotyledons of Asian pea pear Pyrus betulaefolia, which is used as rootstock. Among the various Agrobacterium strains tested, only strain AKE10 was found suitable for transformation. Gao et al. (2002) developed a method of transformation of cotyledonary explants. High transformation efficiency (82.7%) was obtained when cocultivation was in the dark for 7 days. Matsuda et al. (2005) developed a transformation method suitable for cultivars with low ability to regenerate by using leaf disc and axillary shoot meristem. In this study, selection in 5 mg/L kanamycin and 375 mg/L carbenicillin resulted in production of transformed shoots at a frequency of 4.8%. Furthermore, Sun et al. (2011) reported a fivefold increase in transformation frequency of leaf segments by cocultivation of Agrobacterium in leaf segments on a liquid induction medium. Transformation of nodal cuttings using A. rhizogenes was reported by Bosselut et al. (2011). They used a vector containing reporter gene Egfp. The agro-inoculated cuttings were placed in rooting medium. The rooted cuttings were successfully used to produce transgenic composite plants and hairy roots. Nakajima et al. (2013) obtained transformed adventitious shoots in Japanese pear by cocultivating cotyledonary explant with A. tumefaciens.
Nutritional Composition of Pear Cultivars (Pyrus spp.)
Xia Li, ... Wenyuan Gao, in Nutritional Composition of Fruit Cultivars, 2016
Botanical Aspects
The genus Pyrus belongs to the rose family (Rosaceae). There are at least 26 primary species and 10 naturally occurring interspecific hybrid taxa (Table 1), widely distributed in Europe, Asia, and North Africa (Aldasoro et al., 1996). More than 5000 cultivars have been named around the world. Many species are considered to have originated in East Asia and have been cultivated in China, Japan, Korea, etc. for at least 3000 years. Other major centers of diversity include the Mediterranean, Georgia, and Central Asia. Pears are thought to have been cultivated in Europe as early as 1000 BC. All species of Pyrus are capable of interspecific hybridization despite the wide geographic distribution of the genus. Hence, it is often difficult to differentiate between similar taxa and taxa which have been given species names in the past and are now considered to be either naturally occurring hybrids, subspecies, or varieties. Dispersal from the centers of origin is believed to have occurred both east and west along mountain chains (Bell, 1996). Kikuchi (1996) classified Pyrus species into three groups: small fruited species with two carpels, large fruited species with five carpels, and their hybrids with three to four carpels. There are about five primary small fruited species (also known as Asian pear species), mainly distributed in China, Japan and Korea, which are used for ornamental purposes or as rootstocks.
Explanation:
hope it is very helpful to you
pls mark as brainlist answer