Articles written in Journal of Biosciences
Volume 29 Issue 4 December 2004 pp 471-487
Sanjeev Kumar Baniwal Kapil Bharti Kwan Yu Chan Markus Fauth Arnab Ganguli Sachin Kotak Shravan Kumar Mishra Lutz Nover Markus Port Klaus-Dieter Scharf Joanna Tripp Christian Weber Dirk Zielinski Pascal von Koskull-DÖring
Compared to the overall multiplicity of more than 20 plant Hsfs, detailed analyses are mainly restricted to tomato and Arabidopsis and to three important representatives of the family (Hsfs A1, A2 and B1). The three Hsfs represent examples of striking functional diversification specialized for the three phases of the heat stress (hs) response (triggering, maintenance and recovery). This is best illustrated for the tomato Hsf system: (i) HsfA1a is the master regulator responsible for hs-induced gene expression including synthesis of HsfA2 and HsfB1. It is indispensible for the development of thermotolerance. (ii) Although functionally equivalent to HsfA1a, HsfA2 is exclusively found after hs induction and represents the dominant Hsf, the “working horse” of the hs response in plants subjected to repeated cycles of hs and recovery in a hot summer period. Tomato HsfA2 is tightly integrated into a network of interacting proteins (HsfA1a, Hsp17-CII, Hsp17-CI) influencing its activity and intracellular distribution. (iii) Because of structural peculiarities, HsfB1 acts as coregulator enhancing the activity of HsfA1a and/or HsfA2. But in addition, it cooperates with yet to be identified other transcription factors in maintaining and/or restoring housekeeping gene expression.
Volume 34 Issue 2 June 2009 pp 199-202 Brief communication
Volume 36 Issue 2 June 2011 pp 363-376 Articles
High levels of expression of the
Volume 45 All articles Published: 23 June 2020 Article ID 0086 Article
The sticky rice of Assam is traditionally classified as bora (glutinous) and chokuwa (semi-glutinous) basedon their stickiness after cooking. The Waxy (Wx) gene encodes for granule-bound starch synthase (GBSS)that controls the synthesis of amylose, which is a key determinant of rice end-use quality attributes. In thisreport, we analysed the level of variation in grain quality traits in a collection of bora and chokuwacultivars, and examined the nucleotide diversity at the Wx locus of selected rice accessions to identify thepossible cause of low-amylose in these rice cultivar groups. The Wx gene sequencing from 24 bora andchokuwa cultivars revealed several nucleotide variations that can explain the variation in the amylosephenotypes. The nucleotide polymorphisms in the downstream intron regions were similar to those reportedin Bangladeshi Beruin cultivars. Among the Wx polymorphisms, the CTn microsatellite in exon 1 and G/TSNP in intron 1 (G/T-Int1) should be considered for marker assisted breeding involving bora cultivars. TheWx gene tree, classified the bora accessions possessing the G/T-Int1 SNP as japonicas. However, clusteranalysis using microsatellite markers classified the bora and chokuwa cultivars as indica, and intermediateof indica-aus. The findings of this study supplemented our understanding on the evolution of the Wx geneunder human selection. The results will assist plant breeders to effectively improve the bora and chokuwalandraces.
Volume 45, 2020
Continuous Article Publishing mode
Click here for Editorial Note on CAP Mode