scholarly journals Degradation of Cell Wall Polysaccharides during Tomato Fruit Ripening

1979 ◽  
Vol 63 (1) ◽  
pp. 117-120 ◽  
Author(s):  
Kenneth C. Gross ◽  
Stephen J. Wallner
Keyword(s):  
Cell Wall ◽  
Fruit Ripening ◽  
Tomato Fruit ◽  
Cell Wall Polysaccharides ◽  
Tomato Fruit Ripening

scholarly journals 45Ca mobility and distribution during ripening and maturation of Rutgers and RIN tomatoes

1986 ◽  
Vol 58 (1) ◽  
pp. 27-32
Author(s):  
L. R. Howard ◽  
A. Uusi-Rauva ◽  
J. J. Laine
Keyword(s):  
Cell Wall ◽  
Fruit Ripening ◽  
Early Stage ◽  
Tomato Fruit ◽  
Tissue Levels ◽  
Tomato Fruit Ripening ◽  
Soluble Calcium ◽  
Low Levels

Radioisotope 45Ca was used to examine changes in levels of bound and soluble calcium during tomato fruit ripening, and the distribution of calcium in different regions of Rutgers and Rin (non-ripening) tomato tissue. Levels of cell wallmiddle lamella bound 45Ca decreased readily in pericarp tissue during ripening of Rutgers tomatoes with only as mall decrease being observed in RIN fruit. No significant increase in soluble 45Ca was observed for either genotype during ripening. Decreasing levels of bound and soluble 45Ca were observed from calyx to blossom end of pericarp tissue in Rutgers and RIN fruits. Low levels of bound 45Ca were found in the inner locular walls at an early stage of tomato ripening. The implication of low levels of cell wall bound calcium in relation to catabolic changes associated with ripening are discussed.

scholarly journals Role of the tomato fruit ripening regulator MADS-RIN in resistance to Botrytis cinerea infection

2021 ◽  
Author(s):  
Hui Zheng ◽  
Rong Jin ◽  
Zimeng Liu ◽  
Cui Sun ◽  
Yanna Shi ◽  
...  
Keyword(s):  
Cell Wall ◽  
Botrytis Cinerea ◽  
Fruit Ripening ◽  
Tomato Fruit ◽  
Grey Mould ◽  
Pathogen Resistance ◽  
Ethylene Response Factor ◽  
Expression Of Genes ◽  
Tomato Fruit Ripening ◽  
Genes Encoding

Abstract Tomato MADS-RIN (RIN) transcription factor has been shown to be a master activator regulating fruit ripening. Recent studies have revealed that in addition to activating many other cell wall genes, it also represses expression of XTH5, XTH8 and MAN4a, which are positively related to excess flesh softening and cell wall degradation, which might indicate it has a potential role in pathogen resistance of ripening fruit. In this study, both wild type (WT) and RIN-knockout (RIN-KO) mutant tomato fruit were infected with Botrytis cinerea, to investigate the function of RIN in defence against pathogen infection during ripening. The results showed that RIN-KO fruit were much more sensitive to B.cinerea infection with larger lesion sizes. Transcriptiome data and qRT-PCR assay indicate genes of phenylalanine ammonialyase (PAL) and chitinase (CHI) in RIN-KO fruit were reduced and their corresponding enzyme activities were decreased. Transcripts of genes encoding pathogenesis-related proteins (PRs), including PR1a, PRSTH2 and APETALA2/Ethylene Response Factor (AP2/ERF) including ERF.A1, Pti5, Pti6, ERF.A4 were reduced in RIN-KO fruit comparing to WT fruit. Moreover, in the absence of RIN the expression of genes encoding cell wall modifying enzymes XTH5, XTH8, MAN4a has been reported to be elevated, which is potentially correlated with cell wall properties. When present, RIN represses transcription of XTH5 by activating ERF.F4 a class II (repressor class) ERF gene family member and ERF.F5. These results support the conclusion that RIN enhances ripening-related resistance to grey mould infection by upregulating pathogen-resistance genes and defense enzyme activies as well as reducing accumulation of transcripts encoding some cell wall enzymes.

scholarly journals Changes in Photosynthetic Capacity and Photosynthetic Protein Pattern during Tomato Fruit Ripening

1987 ◽  
Vol 84 (3) ◽  
pp. 911-917 ◽  
Author(s):  
Birgit Piechulla ◽  
Richard E. Glick ◽  
Hubert Bahl ◽  
Anastasios Melis ◽  
Wilhelm Gruissem
Keyword(s):  
Fruit Ripening ◽  
Photosynthetic Capacity ◽  
Protein Pattern ◽  
Tomato Fruit ◽  
Tomato Fruit Ripening

Bio-speckle activity applied to the assessment of tomato fruit ripening

2009 ◽  
Vol 103 (1) ◽  
pp. 116-119 ◽  
Author(s):  
G.G. Romero ◽  
C.C. Martinez ◽  
E.E. Alanís ◽  
G.A. Salazar ◽  
V.G. Broglia ◽  
...  
Keyword(s):  
Fruit Ripening ◽  
Tomato Fruit ◽  
Tomato Fruit Ripening

scholarly journals Infection Strategies Deployed by Botrytis cinerea, Fusarium acuminatum, and Rhizopus stolonifer as a Function of Tomato Fruit Ripening Stage

2019 ◽  
Vol 10 ◽  
Author(s):  
Stefan Petrasch ◽  
Christian J. Silva ◽  
Saskia D. Mesquida-Pesci ◽  
Karina Gallegos ◽  
Casper van den Abeele ◽  
...  
Keyword(s):  
Botrytis Cinerea ◽  
Fruit Ripening ◽  
Tomato Fruit ◽  
Rhizopus Stolonifer ◽  
Ripening Stage ◽  
Fusarium Acuminatum ◽  
Tomato Fruit Ripening

scholarly journals Potato Virus X-induced LeHB-1 Silencing Delays Tomato Fruit Ripening

2018 ◽  
Vol 143 (6) ◽  
pp. 454-461 ◽  
Author(s):  
Xiaohong Wang ◽  
Bishun Ye ◽  
Xiangpeng Kang ◽  
Ting Zhou ◽  
Tongfei Lai
Keyword(s):  
Potato Virus ◽  
Fruit Ripening ◽  
Ph Value ◽  
Tomato Fruit ◽  
Potato Virus X ◽  
Anthocyanin Content ◽  
Genetic Trait ◽  
Tomato Fruit Ripening ◽  
Homeobox Protein ◽  
Complex Genetic Trait

Tomato (Solanum lycopersicum) fruit ripening is a complex genetic trait correlating with notable fruit phenotypic, physiologic, and biochemical changes. Transcription factors (TFs) play crucial roles during this process. LeHB-1, an HD-zip homeobox protein, is a ripening-related TF and acts as an important regulator of fruit ripening. However, the detailed biochemical and molecular basis of LeHB-1 on tomato fruit ripening is unclear. In the current study, the biologic functions of LeHB-1 were determined by a potato virus X (PVX)-mediated gene-silencing approach. The results indicate that PVX-induced LeHB-1 silencing in tomato could decrease pigment accumulation and delay fruit ripening. Compared with controls, nonripening flesh retains a greater pH value and a lesser anthocyanin content. By evaluating expression levels of genes related to tomato fruit ripening, we inferred that LeHB-1 located at the downstream of LeMADS-RIN-mediated regulatory network. In addition, LeHB-1 silencing mainly disturbed phytoene desaturation and isomerization, and led to a decrease in trans-lycopene accumulation, but did not influence flavonoid biosynthesis directly in tomato fruit. The findings provide a theoretical foundation for illustrating the biologic functions of LeHB-1 in tomato fruit ripening and quality.

Identification of circular RNAs and their targets during tomato fruit ripening

2018 ◽  
Vol 136 ◽  
pp. 90-98 ◽  
Author(s):  
Junliang Yin ◽  
Mengyu Liu ◽  
Dongfang Ma ◽  
Jiawen Wu ◽  
Shenglan Li ◽  
...  
Keyword(s):  
Fruit Ripening ◽  
Tomato Fruit ◽  
Circular Rnas ◽  
Tomato Fruit Ripening
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