1、Quality and expression of ethylene response genes of ‘Daebong’ persimmon fruit during ripening at different temperatures

DkCTR, DkEIL and DkERF are key genes to control fruit softening of persimmon. Expression of ethylene response genes were similar in both temperature conditions. Quality was improved from 2 to 4 d of ripening at 25 °C for utilization of fresh fruit.

2、Phenolic compounds in persimmon during maturation and on

Changes in weight, Brixº, moisture and phenolic substances, extractable with water, methanol and aqueous methanolic solution, were determined during maturation and on-tree ripening (120 days) of persimmon.

3、Full article: Role of abscisic acid (ABA) during persimmon maturation and in detached young fruits

In this study, we studied the changes in endogenous ABA during the ripening of ‘Hanagosho’ persimmon fruit, and investigated ABA and ethylene production under water stress.

Expression of ethylene response genes during persimmon fruit astringency removal

Thirteen ethylene signaling related genes were isolated and studied during ripening of non-astringent ‘Yangfeng’ and astringent ‘Mopan’ persimmon fruit. Some of these genes were characterized as ethylene responsive.

Postharvest nitric oxide treatment of persimmon (Diospyros kaki l.) improves fruit quality during storage

In this study, SNP treatment markedly extended the postharvest life of persimmon fruit, and maintained high levels of TPC and ST (figures 3, 4), indicating that NO treatment delayed the senescence of persimmon fruit during storage.

Advancing full production and increasing yield in young 'Triumph' persimmon orchards

We recommend that the trial be continued for a further few seasons so that the effect of water and fertilizer application rates on fruit quality and storability can be assessed. Fruit set may also be affected as trees reach their mature size with a concomitant increase in shading.

Identification and characterization of ethylene receptor homologs expressed during fruit development and ripening in persimmon

To better understand the regulatory role of ethylene in persimmon fruit ripening, we identified the ethylene receptor homologs expressed during fruit development and ripening.

DkXTH8, a novel xyloglucan endotransglucosylase/hydrolase in persimmon, alters cell wall structure and promotes leaf senescence and fruit postharvest

In this work, we isolated a new XTH gene, DkXTH8, from persimmon fruit. Transcriptional profiling revealed that DkXTH8 peaked during dramatic fruit softening, and expression of DkXTH8 was...

Postharvest Biology and Technology of Persimmon

Removal of astringency while preserving fruit quality has been one of the main challenges of food scientists working on persimmon. Moreover, persimmon fruit are sensitive to manifest chilling injury when stored at low temperatures.

Effects of Ethylene on Respiration, Ethylene Production and Ripening of Japanese Persimmon Fruit Harvested at Different Stages of Development

The effects of 10ppm ethylene treatment on the respiratory rate, ethylene evolution and ripening of Japanese persimmon (Diospiros kaki Thunb. cv. Fuyu) fruits harvested at different stages of development during from June to November were investigated at 25°C.

Water and fertilizer management during the ripening period of persimmons is a critical factor in ensuring fruit quality and yield. The following are detailed management recommendations:

1. Water Management

(1) Irrigation System

An appropriate irrigation system should be established based on climatic conditions, soil type, and the growth stage of persimmons. Generally, persimmons require more water during the early growth stages to meet their nutrient demands. As the fruit matures, irrigation volume should gradually decrease to reduce water consumption. In dry seasons or regions with low rainfall, timely irrigation is essential to prevent poor fruit quality due to water deficiency.

(2) Irrigation Timing

Persimmons have a long growing period and high water requirements. Adequate water supply should be maintained before fruit maturity to promote rapid fruit expansion. After maturity, irrigation volume should be progressively reduced to minimize water use. Additionally, irrigation timing should be adjusted flexibly according to weather conditions to adapt to seasonal changes.

(3) Irrigation Methods

Adopt water-saving techniques such as drip irrigation or sprinkler irrigation to improve water utilization efficiency and reduce waste. Regular inspection of irrigation facilities is necessary to ensure proper operation and effectiveness.

2. Fertilizer Management

(1) Base Fertilizer Application

Before planting, sufficient base fertilizer should be applied to provide essential nutrients for persimmon growth. Base fertilizers typically include organic materials (e.g., chicken manure, cow dung), compound fertilizers (with an N-P-K ratio of 15-15-15), and micronutrient fertilizers (e.g., boron, zinc, copper). Organic fertilizers improve soil structure and fertility, compound fertilizers supply major nutrients, and micronutrient fertilizers address potential deficiencies. Fertilization should follow the principle of "small amounts, frequent applications" to avoid root burn from excessive fertilizer.

(2) Topdressing

During the growth period, topdressing can be conducted based on plant growth and soil fertility. Foliar spraying or soil application are common methods. For foliar spraying, composite fertilizers containing nitrogen, phosphorus, potassium, and microelements can promote growth and fruit development. For soil application, slow/controlled-release fertilizers like urea or diammonium phosphate provide stable nutrient release. Topdressing should adhere to the "small amounts, frequent applications" principle to prevent nutrient loss or soil salinization.

(3) Micronutrient Supplementation

If persimmon growth is hindered by soil micronutrient deficiencies, foliar spraying of micronutrient solutions can address the issue. For example, apply zinc sulfate solution for zinc deficiency, borax solution for boron deficiency, or manganese sulfate solution for manganese deficiency.

3. Pest and Disease Control

(1) Disease Control

Common persimmon diseases include Ceratosphaeria phyllostachydis (anthracnose) and Alternaria alternata (black star disease). Control measures include selecting resistant varieties, crop rotation, strengthening field management, and promptly removing infected debris. Biopesticides or chemical fungicides may be used if necessary.

(2) Pest Control

Common pests include red spider mites, scale insects, and Japanese beetles. Control measures involve selecting resistant varieties, crop rotation, enhancing field management, and applying insecticides. Prompt action is required to prevent pest spread.

water and fertilizer management during persimmon ripening is a systematic process that requires综合考虑climate, soil fertility, and plant growth conditions to develop rational irrigation and fertilization plans. Scientific management effectively enhances fruit quality and yield, supporting sustainable agricultural development.