By combining a 0.3 T permanent magnet with flexible rotation and translation mechanism, probe local electromagnetic shielding, several electrical units, mobile lift, an electric wagon, magnetic resonance imaging (MRI) system was developed for outdoor tree measurements. 2D cross-sectional images of normal diseased branches pear were acquired measurements T(1), T(2), proton density, apparent diffusion constant (ADC). The ADC map clearly differentiated from branches. A whole-day measurement the...

Controlled ice nucleation is an important mechanism in cold-hardy plant tissues for avoiding excessive supercooling of the protoplasm, inducing extracellular freezing and/or accommodating crystals specific tissues. To understand its nature, it necessary to characterize activity (INA), defined as ability a tissue induce heterogeneous nucleation. Few studies have addressed precise localization INA wintering respect function. For this purpose, we recently revised test tube assay and examined...

Ice nucleation activity (INA) of plant intrinsic origins is considered to play important roles in cold hardiness mechanisms. Yet, only a few studies have addressed the spatial and temporal localization INA, how it regulated what its functional are. In our previous study (Kishimoto et al., 2014), we revised test tube method developed highly reproducible assay for measuring INA specimens demonstrated that high occurred cell wall fraction wintering bark tissues blueberry stems corresponded well...

The effects of global warming have been observed in several crops as changes temperature-dependent processes, such dormancy perennial fruit trees. We exposed potted Japanese pear 'Housui' plants to 600 chilling hours (CH) below 7.2°C, which is the theoretical requirement. Such low accumulation was initiated at different times (three treatments) and carried out during four consecutive seasons order observe influence these factors on incidence severity floral primordia necrosis, water...

Fruits of ‘Rendaiji’ persimmon (Diospyros kaki Thunb.), known to be highly susceptible rapid softening after harvest or astringency removal treatment, were treated with 20 μL · L−1 1-methylcyclopropene (1-MCP) at 20°C for 24 h treatment ethanol vapor remove astringency. The fruit then stored monitor ripening-related changes, such as physicochemical, physiological, and biochemical parameters regular intervals. 1-MCP delayed brought about by exposure extended shelf-life the fruits 8 days. No...

Carbon-ion beam is a new irradiation source for inducing mutations in plant breeding effectively. In order to apply this technique banana program, we studied the critical doses vitro and genetic variability black Sigatoka regenerated plants. was irradiated plantlets of cultivars 'Cavendish Enano' 'Williams' with dose 0, 0.5, 1, 2, 4, 8, 16, 32, 64 128 Gy. Biological effects on survival rate were recorded 8 Gy supposed be best dose. Survived propagated evaluate resistance Sigatoka. Six plants...

This study aimed to identify the aromatic compounds present in different aroma types of table grape varieties and deeply understand changes during growth development process. The skin flesh three (‘Kyoho’, ‘Shine Muscat’, ‘Ryuho’) stages were selected determine their using headspace solid-phase microextraction gas chromatography-mass spectrometry principal component analysis. results showed that ‘Kyoho’ ‘Ryuho’ grapes similar, mainly containing C6 esters, whereas Muscat’ was characterized by...

Abstract To identify the compounds that contribute to diverse flavours of table grapes, and volatile 38 grape cultivars harvested over 3 years are evaluated through sensory analysis solvent-assisted flavour evaporation (SAFE). The characterized grouped into seven clusters by hierarchical cluster (HCA) using evaluation data with a wheel specific grapes. These were similar conventional classifications, except foxy neutral form multiple clusters, highlighting diversity SAFE method provides...

Introduction . The avocado (Persea americana Mill.) fruit is sensitive to chilling injury (CI) when exposed low temperatures. High lipid content in pulp makes it prone oxidation, resulting rancidity and subsequent production of undesirable flavours quality loss during storage. Materials methods Avocado (cv. Becon) were treated with 1 μ L.L-1 1-MCP for 24 h at 20 °C, thereafter stored 4 °C 21 d under oxygen atmosphere (3.5% O2 ), followed by transferring 14 simulate the shelf life. CI index,...

To understand the effects of plant growth regulators (PGRs) on aromatic compounds 'Kyoho' grapes, changes in fruit quality and aroma compound content at different developmental stages were investigated after treatment with gibberellin A3 (GA3) flowering stage abscisic acid (ABA) veraison. Thirty identified peels pulps, 3-hexenal, (E)-2-hexenal, ethyl acetate, butyrate, limonene being main compounds. GA3 inhibited ester synthesis, including terpenes, as well limonene, while promoting...

Ice formation and propagation in the flower young fruit of Japanese pear 'Kosui' were investigated with infrared (IR) video thermography imaging system. The changes thermal response (exotherm) freezing events could be detected using camera exotherm rise 2-5 °C accompanied by a marked color change tissues. With first bloom flowers, temperature peduncles decreased faster than that receptacle; initial ice nucleation occurred primarily petals, sepals and/or receptacle. Subsequently, was...

‘Rendaiji’ persimmon (Diospyros kaki Thunb.) is a pollination variant astringent type that characterized by low levels of the ethylene production rate during ripening. However, serious problem in postharvest handling mature fruits soften quite rapidly accompanied with increased after treatments to remove astringency. In this study, we investigated changes biosynthesis, following accumulation 1-aminocyclopropane-1-carboxylic acid (ACC) and 1-(malonylamino)-cyclopropane-1-carboxylic (MACC), as...

Effects of n -propyl dihydrojasmonate (PDJ) treatment on flowers Japanese pear 'Kousui' ( Pyrus pyrifolia Nakai cv. Kousui) during spring frost were investigated to study mechanisms for avoiding injury. PDJ applied the flowering period resulted in a lower injury index ovules and pistils after freezing tests. Average ion leakage control was 37.9% balloon stage at -5 °C, while treated with displayed 16.6% leakage. Similarly, full bloom stage, reduced °C from 73.1% 47.8% control. The organs...

Physicochemical characteristics (including peel/pulp firmness, peel color, soluble sugars, starch, titratable acidity and moisture content) were determined in two cultivars of banana (Musa spp. 'Williams' 'Grande naine'). The bananas cultivated Ecuador under production systems; low chemical systems (LCPS) conventional system (CPS). one -year evaluation period was marked by changes the weather pattern, thereby enabling us to evaluate effects seasonal variation on characteristics. results...

Banana fruits (Musa sp., AAA group, Cavendish subgroup cv. ‘Williams’) were exposed to two hot air treatment regimes namely 50oC for 10 minutes (HAT A) and 40oC 60 B). The then stored at chilling temperatures (8oC) up 21 days evaluate the efficacy treatments on injury (CI) alleviation activity of reactive oxygen species (ROS) following treatments. initially disrupted normal cellular functions as evidenced by higher percentage initial ion leakage. However upon transfer cold storage, trend was...

ISHS VIII International Symposium on Temperate Zone Fruits in the Tropics and Subtropics INFLUENCE OF CHILLING ACCUMULATION TIME ON FLOWER BUD ABORTION OCCURRENCE IN JAPANESE PEAR GROWN UNDER MILD WINTER CONDITIONS

Glutathione (GSH) can exert effects in the regulation of several growth and developmental events. Considering that glutathione play an important function during bud dormancy, pool on Japanese pear (Pyrus pyryfolia) tissues plants exposed to different environmental conditions through winter season was analyzed. Mixed buds kept under natural cold accumulation (NC) presented higher GSH/GSSG ratio a significant increase total content concomitance with endodormancy overcoming. A correspondingly...