ABSTRACT: Study was conducted to compare fresh, natural and accelerated seed lots of wheat with germination and vigor index varied from 98.67 to 44.00 and 2960 to 524.92 respectively. Germination loss became more in accelerated ageing as compared to fresh and natural aged lot. Total soluble seed protein banding pattern of different aged seed revealed that there has been decline in band intensity, band numbers or disappearance of some bands with ageing; it is more in accelerated aged lot as compared to natural aged seed lot. Thus, seed lot with slight variation either in germination or vigor in germination or vigor could also be used for varietal characterization by SDS-PAGE to differentiate the cultivars or even for genetic purity testing, but not the seed lots which are severely aged that lost threshold limit of 50 per cent.
Table of Contents
1. Abstract
2. Introduction
3. Materials and Methods
4. Results and Discussion
4.1 Effect of natural and artificial ageing on Germination of wheat
4.2 Effect of natural and artificial ageing on vigor index- I of wheat
Objectives and Topics
The primary research objective of this study is to evaluate the influence of seed ageing—both natural and accelerated—on the total soluble seed protein profile in various wheat cultivars. The research aims to determine the extent to which protein degradation occurs during ageing and whether specific protein profiles can still serve as reliable markers for varietal characterization and genetic purity testing, even when seed vigor and germination are compromised.
- Impact of natural vs. accelerated ageing on seed germination and vigor
- Electrophoretic analysis (SDS-PAGE) of total soluble seed proteins
- Assessment of band intensity and disappearance as indicators of seed deterioration
- Determination of the threshold limit for seed ageing in cultivar identification
- Comparative analysis of different wheat genotypes (C-306, PBW-502, WH-542, WH-711, WH-283, RAJ-3765)
Excerpt from the Book
RESULTS AND DISCUSSION
Seeds attain maximum quality at physiological maturity. Starting from this point, there is a series of degenerative events that reduce the survival capacity of seeds and lead to loss of vigor and germination [9]. Main sites of ageing at cellular level are mitochondria, ribosome and membranes. Ageing process is mainly due to reduction in enzymatic activity; increased respiration and macromolecule synthesis, which are associated with initial deterioration of membrane system. A considerable amount of work has been done on the change in protein content [10,11,12&13] and changes in activity of proteolytic enzymes [14,15,16&17] related to seed deterioration. However, there is a need to know whether the protein profiles, the qualitative aspect of protein is going to alter due to ageing that would help to select the right age of seed lot for varietal characterization since protein profiles are being used to identify the off type at seed level.
In present study, natural as well as accelerated ageing affects germination and vigor of seeds. Germination loss become more accentuated in accelerated ageing and in natural ageing it progressively increased with time of ageing [Table 1&2], it varied from 98.67 to 44.00 from fresh to aged seed lots, accordingly vigor index also varied from 2960 to 524.92.
Summary of Chapters
Abstract: Provides a concise overview of the study, noting the decline in seed protein banding patterns due to ageing and the potential use of SDS-PAGE for varietal characterization.
Introduction: Outlines the significance of protein markers in cultivar identification and establishes the necessity of evaluating how seed ageing affects these protein profiles.
Materials and Methods: Details the experimental procedures, including the six wheat varieties selected, the ageing processes (artificial and natural), and the technical steps for performing SDS-PAGE analysis.
Results and Discussion: Presents the data on germination and vigor loss, discusses the degradation of protein banding patterns observed through SDS-PAGE, and evaluates the stability of specific protein bands.
Keywords
Wheat seed, accelerated ageing, SDS-PAGE, protein profiles, germination, vigor index, varietal characterization, genetic purity, seed deterioration, electrophoresis, physiological maturity, banding pattern, Triticum aestivum
Frequently Asked Questions
What is the fundamental focus of this research?
The research examines how the process of ageing, through both natural storage and accelerated laboratory conditions, affects the biochemical protein structure of wheat seeds.
What are the central thematic areas?
The study centers on seed technology, specifically the intersection of seed viability (germination/vigor), biochemical protein analysis via electrophoresis, and its application in agricultural cultivar identification.
What is the primary objective of this work?
The primary objective is to define the threshold limit of seed ageing beyond which protein profiles are too degraded to be used for accurate cultivar characterization or genetic purity testing.
Which scientific method is employed?
The researchers utilize SDS-PAGE (Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis) to separate and visualize the total soluble protein profiles of wheat seeds across different stages of degradation.
What topics are covered in the main body?
The main body covers the methodology of seed preparation and electrophoresis, followed by a comparative analysis of germination and vigor data, and an evaluation of specific protein band intensity changes across six wheat varieties.
Which keywords characterize this paper?
Key concepts include accelerated ageing, SDS-PAGE, protein profiles, seed germination, and wheat cultivar characterization.
How does accelerated ageing differ from natural ageing in this study?
Accelerated ageing resulted in more severe and rapid germination loss and protein band degradation compared to natural ageing, which showed a more progressive decline over time.
Why are protein profiles considered useful for wheat classification?
Proteins are direct products of structural genes and are independent of environmental fluctuations, making them stable markers for identifying cultivars and detecting off-types within seed lots.
Is every protein band equally affected by seed ageing?
No, the study concludes that certain bands remain stable and do not disappear despite the ageing process, whereas others show significant reduction in intensity or complete disappearance.
- Quote paper
- Davender Chauhan (Author), D. S. Deswal (Author), 2010, Effect of Accelerated and Natural ageing on Total Soluble Seed Protein Profile of Wheat (Triticum aestivum) , Munich, GRIN Verlag, https://www.hausarbeiten.de/document/176551
