Apple tree flowering is mediated by low level of melatonin under the regulation of seasonal light signal

Haixia Zhang; Lin Wang; Kun Shi; Dongqian Shan; Yunpeng Zhu; Chanyu Wang; Yixue Bai; Tianci Yan; Xiaodong Zheng; Jin Kong

doi:10.1111/jpi.12551

Apple tree flowering is mediated by low level of melatonin under the regulation of seasonal light signal

Journal of Pineal Research ◽

10.1111/jpi.12551 ◽

2019 ◽

Vol 66 (2) ◽

pp. e12551 ◽

Cited By ~ 13

Author(s):

Haixia Zhang ◽

Lin Wang ◽

Kun Shi ◽

Dongqian Shan ◽

Yunpeng Zhu ◽

...

Keyword(s):

Apple Tree ◽

Light Signal ◽

Low Level

Download Full-text

Polymorphism of traits of flower and fruit of the Tsumi apple tree (Malus zumi (Matsum.) Rehder)

АгроЭкоИнфо ◽

10.51419/20216621 ◽

2021 ◽

Vol 6 (48) ◽

pp. 21-21

Author(s):

Vitaly Donskih ◽

Tatiana Aniskina ◽

Victоria Kryuchkova

Keyword(s):

Apple Tree ◽

Strong Relationship ◽

Botanical Garden ◽

Fruit Weight ◽

Cultivated Plants ◽

Low Level ◽

Strong Positive Relationship ◽

Coefficients Of Variation ◽

Anther Length ◽

Flower Traits

The Tsumi apple tree is a valuable crop due to the presence of a gene for resistance to powdery mildew, abundant annual fruiting and a special decorative effect during flowering and fruiting. Its breeding potential has been little studied; therefore, it is necessary to study the morphometric characteristics of a flower and a fruit and establish connections between them. The collection of flowers and fruits of the Tsumi apple tree was carried out in the laboratory of cultivated plants of the Tsytsin Main Botanical Garden in 2021. The coefficients of variation and correlation according to Spearman were determined. It was found that the polymorphism of flower traits is at a very low level (from 4.4% to 14.2%). The number of flowers per inflorescence varies within 15.9%, which corresponds to the average level of polymorphism, as well as in the weight of the fruit (17.3%) and in the weight of seeds (19.5%). Variations in the length of the peduncle, the number of seeds, the length of the fruit, and the diameter of the fruit are at a very low level (6.9-13.6%). A significant number of reliable inverse (negative) correlations were found between signs of moderate strength (0.5 <r <0.6): a strong relationship between fruit weight and anther length (r = -0.73), fruit length and filament length (r = -0.71). A strong positive relationship was found between the following traits: fruit weight and fruit diameter (r = 0.79), seed weight. Keywords: POLYMORPHISM, FLOWER, CRABAPPLES, SORBOMALUS, MALUS ZUMI, TSUMI APPLE TREE, VARIABILITY, MORPHOLOGY

Download Full-text

Tryptophan-Niacin Metabolism in Rat with Puromycin Aminonucleoside-Induced Nephrosis

International Journal for Vitamin and Nutrition Research ◽

10.1024/0300-9831.76.1.28 ◽

2006 ◽

Vol 76 (1) ◽

pp. 28-33 ◽

Cited By ~ 7

Author(s):

Yukari Egashira ◽

Shin Nagaki ◽

Hiroo Sanada

Keyword(s):

Body Weight ◽

Urinary Excretion ◽

Enzyme Activities ◽

Treated Group ◽

Control Group ◽

Puromycin Aminonucleoside ◽

Low Level ◽

Key Enzyme

We investigated the change of tryptophan-niacin metabolism in rats with puromycin aminonucleoside PAN-induced nephrosis, the mechanisms responsible for their change of urinary excretion of nicotinamide and its metabolites, and the role of the kidney in tryptophan-niacin conversion. PAN-treated rats were intraperitoneally injected once with a 1.0% (w/v) solution of PAN at a dose of 100 mg/kg body weight. The collection of 24-hour urine was conducted 8 days after PAN injection. Daily urinary excretion of nicotinamide and its metabolites, liver and blood NAD, and key enzyme activities of tryptophan-niacin metabolism were determined. In PAN-treated rats, the sum of urinary excretion of nicotinamide and its metabolites was significantly lower compared with controls. The kidneyα-amino-β-carboxymuconate-ε-semialdehyde decarboxylase (ACMSD) activity in the PAN-treated group was significantly decreased by 50%, compared with the control group. Although kidney ACMSD activity was reduced, the conversion of tryptophan to niacin tended to be lower in the PAN-treated rats. A decrease in urinary excretion of niacin and the conversion of tryptophan to niacin in nephrotic rats may contribute to a low level of blood tryptophan. The role of kidney ACMSD activity may be minimal concerning tryptophan-niacin conversion under this experimental condition.

Download Full-text