Kaihei Koshio

Tokyo University of Agriculture · Department of International Agricultural Development

Corosolic acid content and distribution in Lagerstroemia speciosa Pars. were investigated and it was made sure that the red leaves contained more corosolic acid than the green leaves and other parts such as petal, roots and seeds. The leaf redness was identified to be derived from cyanidin 3-O-glucoside which was first identified in this species. T...

Effects of abscisic acid (ABA) applied to the culture solution on the growth, water relations and temperature stress in tomato plants were investigated.1. Plant growth was strongly inhibited when plants were placed in culture solutions containing 5 and 10 ppm ABA ; it was slightly promoted in culture solutions of 0.1 ppm ABA primarily because root...

A field trial of salad oil application for the induction of male flower browning ofCryptomeria japonica was conducted. The browning effect of salad oil applied from a helicopter was found to vary from clone to clone depending on the earliness of male flower development. When applied at the flower initiation stage, salad oil turned male flowers to a...

The effect of treatment with fatty acids on the browning of male flowers of Cryptomeria japonica and its mechanism were studied with emphasis on the role of trans -2-hexenal. The effect of treatment with fatty acids on the browning of male flowers was the highest when fatty acids were applied at the end of August, decreasing month by month thereaft...

The aim of this study was to determine total phenolics (TP) content, total flavonoids (TF) level, and antioxidant activity of methanol extracts from leaf parts of 15 Vietnamese wild plants. TP content showed the highest amount in methanol extracts from Altenanthera sessilis ( ppm), and followed by Eclipta prostrata ( ppm) and Cassia tora ( ppm). Th...

Passion fruit (Passiflora edulis) is a tropical fruit that can be consumed fresh or processed. It is a typical respiratory climacteric fruit which is highly perishable because of the loss of water that causes dehydration and thus shrinkage, affecting the fruit appearance; in addition, some quality traits such as fruit weight, firmness and vitamin C...

Pre-sowing seed priming is one of the methods used to improve the performance of tomato plants under salt stress, but its effect photosynthesis, yield, and quality have not yet been well investigated. This experiment aimed to alleviate the impact of sodium chloride stress on the photosynthesis parameters of tomato cv. Micro−Tom (a dwarf Solanum lyc...

Fertilization is essential for the optimal growth and development of crops; however, the amount of fertilizer can cause positive or negative effects depending on its rate. In addition, the cultivation system plays a significant role in determining vegetative growth and fruit quality. Therefore, the objectives of this study were to examine the Micro...

Seed is a fundamental tool to carry out breeding processes and for the propagation of the crops; however, seed propagation generally has low and irregular germination. Passion fruit (Passiflora) species are economically important for Ecuador, which is the main exporter of passion fruit concentrate in Latin America. Ecuadorian farmers propagate new...

1-Methylcyclopropene (1-MCP) can interact with ethylene receptors and thereby prevents ethylene-dependent responses. In addition, its affinity with ethylene receptors is approximately 1Otimes greater than that of ethylene. Therefore, the aim of this research is to investigate the effect of 1-MCP on the quality of tomatoes (green and pink stages) an...

There are several species of passion fruit grown in South America. However, there is a lack of information about the mineral content in their pulp. Thus, the objective of the present research was to determine the mineral content in the pulp of different germplasms of passion fruit [Passiflora edulis f. flavicarpa (INIAP 2009 and P10), P. alata (Swe...

After pollination, aborted date fruits known as tricarpel or shiss, remain on the brunch in most of the varieties and exert competition on fruits in water and nutrients. In Sukkary, they drop down at the end of kimri stage, while remain on ‘Khlass’ until the harvest. Most of them remain as bisr and little turns into tamr which is not appreciated in...

Tropical fruits are in high demand for their flavor and for their functional composition because these compounds are considered nutraceuticals. Passion fruit production is of economic importance to Ecuador; however, several Passiflora species are grown and each has to be analyzed to identify their phytochemical composition. In this study, the polyp...

Jaboticaba is a subtropical fruit native to Brazil, that is cultivated in South America and Southeast Asia etc. One of the barriers for commercializing this fruit is the difficulty in distinguishing the fruit maturation stages and the fruit cannot be kept on the tree for a long time due to rapid maturation. This study aimed to understand the compre...

Salinity stress creates serious problems for tomato production in dry climate regions like Southeast Asia. Two sets of experiments were conducted, where the initial experiment was on the effects of salinity on seed germination and seedling characteristics in the laboratory and the second experiment was to evaluate the effects of salinity on growth,...

In Afghanistan, urbanization, population increase, climate change, the application of chemical inputs, hybrid seeds, greenhouse and processing technologies, trade activities and other facilities have brought about great changes in production and the consumption rate of vegetables, especially in the case of tomato. A field survey on the production,...

Low-pressure storage is brought up as a new technology to extend the shelf life of climacteric fruits and vegetables and influence the rate of physiological responses. The aim of this study was to examine the effects of low-pressure storage on physiological and physical changes of cv. ‘Red Hope’ tomato. Green mature and pink stages tomatoes studied...

Organic food production is gaining momentum in Southeast Asian countries. Fertilization management is a challenge for most of the organic farmers. In particular, compost and animal manure applications together with efficient use of leguminous crops are basic practices in organic farming, but it is difficult to control the timing and amount fertiliz...

1-MCP is a new tool for regulating ethylene and preserving the quality of fresh produce. Tomato fruit Solanum lycopersicum cv. Red Ore harvested at green and pink stages was used to examine the effect of 1-MCP on their ethylene production and quality. After treating with 1-MCP for 24 hours, ethylene, ACS, ACC, CO2, color, firmness and weight loss w...

Trans-2-hexenal is a plant natural compound exhibiting a very safe, eco-friendly and strong antifungal activity. We investigated the effect of trans-2-hexenal in alleviating heat stress on tomato seedlings in trials conducted from November 28, 2016 to January 4, 2017 at the Tokyo University of Agriculture, Japan. Wilting in seedlings was alleviated...

Green leaf volatiles (GLVs) are ubiquitous odors in the plant kingdom and modulate not only primary, but also secondary metabolism such as pyrethrin biosynthesis. One of the main tomato fruit GLVs, trans-2-hexenal, was applied to tomato fruit ('Micro-Tom') using a vapor treatment, and its ethylene-inducing ability and effects on primary metabolite...

The effect of 1-methylcyclopropene (1-MCP) on fruits and vegetables has always been a topic of interest. The current study was conducted to investigate the effect of 1-MCP on ethylene production and on quality of apple (Malus domestica) during ripening, of Japanese apricot (Prunus mume) harvested at green and yellow stages, of and asparagus (Aspara...

Tolerance to lodging is an essential trait for the direct-sowing rice cultivation. Effective use of semidwarfing alleles of the sd-1 locus is considered to be promising to breed high-yielding and lodging-tolerant cultivars for direct-sowing. The semidwarfism of sd-1 alleles, however, might have any adverse effect to emergence and establishment of r...

This study aimed to investigate the varietal difference in uprising ability of rice seedling (negative gravitropism), which might be related to the suitability for seedling establishment in direct-seeding cultivation. Characteristics of general features of rice varieties which were collected from different countries were studied, focusing on the co...

The invention provides a herbicidal composition containing, as an active ingredient, glycerol fatty acid ester obtained from fatty acid having an even-numbered carbon number of 6-12 and glycerol.

The present investigation was undertaken to study the effect of storage temperature in controlling ethylene production through the activity and gene expression of ethylene biosynthetic enzymes of 'Irwin' mango during fruit storage. Ethylene evolution and activities of ethylene biosynthetic enzymes, 1-aminocyclopropane-1-carboxylic acid (ACC) syntha...

The recent disaster of earthquake and tsunami on March 11, 2011 severely attacked East Japanese cities and people, and in addition, the accident of nuclear power station will inevitably damage the agricultural activities there. The economical depression influences on the horticulture and floriculture industry as well, through the reluctant consumpt...

The purpose of this study is to analyze antioxidant activity and multidrug resistance reversing activity in several Korean colored soybean (Glycine max Merr.) cultivars. Antioxidant activity of methanol extracts from colored soybean cultivars was evaluated by TBARS (thiobarbituric acid reactive substances), DPPH (1, 1-diphenyl-2-picrylhydrazyl) and...

Oleic acid and nonionic surfactants of oleic acid derivatives.. Control, water; DGTO, diglycerol trioleate; GDO, Glycerol dioleate; GMO, Glycerol monooleate; PEDO, Pentaerythritol dioleate; STF, Sorbitan tri-fatty acid ester.. 16, 18, 18:1, 18:2, 18:3),STO: Sorbitan trioleate) were foliar-sprayed to Cryptomeria japonica and evaluated their browning...

Effect of soil moisture stress on the growth of Corchorus olitorius L. was investigated using two varieties in the glass house during summer at Tokyo, Japan. Smaller growth was showed in light moisture stress (60 -50%) and acute moisture stress (40 -30%) comparing to that of field capacity soil moisture, however the growth in light and acute moistu...

SUMMARY An effective way to induce virus-free plants of greater yam (Dioscorea alata L.) and to propagate them was attempted in this investigation. The incidence of three yam viruses, YMV, YMMV, and JYMV was investigated by RT-PCR and no virus was detected in 1plants regenerated from shoot apex culture followed by in vitro propagation of nodal segm...

This study aimed to investigate the varietal difference in lodging recovery of rice seedling (negative gravitropism), which might be related to the suitability for seedling establishment in direct-seeding cultivation. Characteristics of general features of rice varieties which were collected from different countries were studied, focusing on the co...