scholarly journals Physiological and Ultrastructural Alterations Linked to Intrinsic Mastication Inferiority of Segment Membranes in Satsuma Mandarin (Citrus unshiu Marc.) Fruits

Plants ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 39
Author(s):  
Xuefei Lian ◽  
Feifei Li ◽  
Yuanyuan Chang ◽  
Tie Zhou ◽  
Yuewen Chen ◽  
...  
Keyword(s):  
Shear Force ◽  
Vessel Diameter ◽  
Water Soluble ◽  
Citrus Unshiu ◽  
Citrus Fruits ◽  
Satsuma Mandarin ◽  
Cell Layers ◽  
Juice Sacs

Chewing texture is important for fresh citrus fruits, and the mastication trait of a segment directly determines chewing texture. Roughing disorder impairs the quality of Satsuma mandarin fruits, and it is typically correlated with intrinsic mastication inferiority (IMI). This study explored the role of segment membranes (SMs) in IMI. Similar to IMI in roughing-disordered fruits, segment shear force significantly enhanced relative to controls (CK); cell layers and cell wall thickness increased also in inferior masticating SMs. The ‘Miyamoto Wase’ cultivar exhibited larger segment shear force and more SM cell layers than ‘Juxiangzao’. In SMs, vessel cells could be divided into outside layers where segments adjoin and inside layers where juice sacs grow from. The inside vessel cell layers in the inferior masticating SMs were denser. Vessels with a length of 200 to 300 μm and a diameter of 5 to 15 μm predominated in SMs. The average vessel diameter enlarged by 13% to 16.5% in inferior masticating SMs, depending on cultivars. Furthermore, there was a decrease in vessels with a diameter <5 μm and an increase in vessels >10 μm in the inferior masticating SMs. Between phenotypes, protopectin increased significantly throughout development of inferior masticating SMs, while water-soluble pectin increased during the later stages of development. In one inferior masticating SM sample, protopectin and water-soluble pectin levels were higher in the inner-ring area than those in the outer-ring area. Correspondingly, expression of CuPME21 which is involved in pectin hydrolysis was consistently upregulated in the inferior masticating SMs throughout fruit development. The findings in this work provide novel insights into citrus SM structure and its IMI.

scholarly journals Morphological Characteristics, Fruit Qualities and Evaluation of Reproductive Functions in Autotetraploid Satsuma Mandarin (Citrus unshiu Marcow)

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2441
Author(s):  
Miki Sudo ◽  
Kiichi Yasuda ◽  
Masaki Yahata ◽  
Mai Sato ◽  
Akiyoshi Tominaga ◽  
...  
Keyword(s):  
Reproductive Potential ◽  
Morphological Characteristics ◽  
Pollen Grains ◽  
Fruit Weight ◽  
Citrus Unshiu ◽  
Male And Female ◽  
Reciprocal Crosses ◽  
Satsuma Mandarin ◽  
Seedless Fruits

The morphological characteristics and fruit quality of an autotetraploid plant selected from nucellar seedlings of Satsuma mandarin (Citrus unshiu Marcow.) were investigated. Additionally, in order to evaluate the reproductive potential of male and female gametes of the tetraploid Satsuma mandarin, reciprocal crosses with diploid cultivars were also carried out. The tetraploid had significantly thick and round leaves, as compared to those of the diploid Satsuma mandarin. The sizes of the flowers and pollen grains of the tetraploid were significantly larger than those of the diploid. Pollen fertility of tetraploid was high compared with that of the diploid. The tetraploid produced seedless fruits. The fruit weight of the tetraploid was equal to that of the diploid. Compared to the diploid fruits, the tetraploid fruit had less sugar contents and more organic acid contents. Although the tetraploid fruits showed similar traits to other Citrus tetraploids such as thick and hard peels, the tetraploid had a higher content of carotenoids in the flavedo than the diploid, and the rind color of the tetraploid was much better. In the reciprocal crosses between the tetraploid Satsuma mandarin and diploid cultivars, some seeds were obtained, and triploid progenies were obtained in all cross combinations.

Effect of Postharvest Temperature and Ethylene on Carotenoid Accumulation in the Flavedo and Juice Sacs of Satsuma Mandarin (Citrus unshiu Marc.) Fruit

2009 ◽  
Vol 57 (11) ◽  
pp. 4724-4732 ◽  
Author(s):  
Hikaru Matsumoto ◽  
Yoshinori Ikoma ◽  
Masaya Kato ◽  
Naoko Nakajima ◽  
Yoshinori Hasegawa
Keyword(s):  
Citrus Unshiu ◽  
Carotenoid Accumulation ◽  
Satsuma Mandarin ◽  
Juice Sacs

scholarly journals Evaluation of Edible Quality of Commercial Satsuma Mandarin (Citrus unshiu MARC.)

1978 ◽  
Vol 46 (4) ◽  
pp. 548-554
Author(s):  
Kyuei IINO ◽  
Kazuo OSODO
Keyword(s):  
Citrus Unshiu ◽  
Satsuma Mandarin

Effect of Nitric Oxide Treatment on Storage Quality and Disease Resistance of Satsuma Mandarin Fruits

2012 ◽  
Vol 524-527 ◽  
pp. 2163-2166
Author(s):  
Shun Min Li ◽  
Li Dan Liu ◽  
Lu Zhang ◽  
Ri Zhang Wu ◽  
Xue Kun Zhu ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Colletotrichum Gloeosporioides ◽  
Disease Incidence ◽  
Sugar Content ◽  
Reducing Sugar ◽  
Citrus Fruits ◽  
Storage Quality ◽  
Satsuma Mandarin ◽  
And Storage

The effects of sodium nitroprusside (SNP) treatment on the disease resistance and storage quality of citrus fruits were investigated through inoculation and storage. The results showed that SNP treatment could effectively reduce the disease incidence and lesion diameter of satsuma mandarin inoculated with Colletotrichum gloeosporioides Penz. during storage. Compared with control, weight lose rate degraded, but soluble protein, ascorbic acid (ASA), reducing sugar content and SSC/TA ratio increased in SNP treated fruits. 50 μmol•L-1 SNP treatment had the better effect than 30 and 100 μmol•L-1 SNP treatment.

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