M. I. Qureshi

Nitrogen-Deficiency Stress Induces Protein Expression Differentially in Low-N Tolerant and Low-N Sensitive Maize Genotypes

Nitrogen (N) is essential for proper plant growth and its application has proven to be critical for agricultural produce. However, for unavoidable economic and environmental problems associated with excessive use of N-fertilizers, it is an urgent demand to manage application of fertilizers. Improving the N-use efficiency (NUE) of crop plants to sustain productivity even at low N levels is the possible solution. In the present investigation, contrasting low-N sensitive (HM-4) and low-N tolerant (PEHM-2) genotypes were identified and used for comparative proteome-profiling of leaves under optimum and low N as well as restoration of low N on 3rd (NR3) and 5th (NR5) days after re-supplying N. The analysis of differential expression pattern of proteins was performed by 2-D gel electrophoresis. Significant variations in the expression of proteins were observed under low N, which were genotype specific. In the leaf proteome, 25 spots were influenced by N treatment and four spots were different between the two genotypes. Most of the proteins that were differentially accumulated in response to N level and were involved in photosynthesis and metabolism, affirming the relationship between N and carbon metabolism. In addition to this, greater intensity of some defense proteins in the low N tolerant genotype was found that may have a possible role in imparting it tolerance under N starvation conditions. The new insights generated on maize proteome in response to N-starvation and restoration would be useful toward improvement of NUE in maize.

Nitrogen-Efficient and Nitrogen-Inefficient Indian Mustard Showed Differential Expression Pattern of Proteins in Response to Elevated CO2 and Low Nitrogen

Carbon (C) and nitrogen (N) are two essential elements that influence plant growth and development. The C and N metabolic pathways influence each other to affect gene expression, but little is known about which genes are regulated by interaction between C and N or the mechanisms by which the pathways interact. In the present investigation, proteome analysis of N-efficient and N-inefficient Indian mustard, grown under varied combinations of low-N, sufficient-N, ambient [CO2], and elevated [CO2] was carried out to identify proteins and the encoding genes of the interactions between C and N. Two-dimensional gel electrophoresis (2-DE) revealed 158 candidate protein spots. Among these, 72 spots were identified by matrix-assisted laser desorption ionization-time of flight/time of flight mass spectrometry (MALDI-TOF/TOF). The identified proteins are related to various molecular processes including photosynthesis, energy metabolism, protein synthesis, transport and degradation, signal transduction, nitrogen metabolism and defense to oxidative, water and heat stresses. Identification of proteins like PII-like protein, cyclophilin, elongation factor-TU, oxygen-evolving enhancer protein and rubisco activase offers a peculiar overview of changes elicited by elevated [CO2], providing clues about how N-efficient cultivar of Indian mustard adapt to low N supply under elevated [CO2] conditions. This study provides new insights and novel information for a better understanding of adaptive responses to elevated [CO2] under N deficiency in Indian mustard.

Some hypergeometric summation formulas and series identities associated with exponential and trigonometric functions

Abstract In this paper, we obtain two Gaussian hypergeometric summation formulas and show how each of these summation formulas can be applied to derive several general double-series identities and various generalized hypergeometric representations of such combinations of the exponential and trigonometric functions as The results presented here are presumably new.

Applications of Some Hypergeometric Summation Theorems Involving Double Series

Abstract The main object of this paper is to derive a number of general double series identities and to apply each of these identities in order to deduce several hypergeometric reduction formulas for the Srivastava-Daoust double hypergeometric function. The results presented in this paper are based essentially upon some

Expansion formulae for general triple hypergeometric series

(Received 11 July 1984; revised 27 March 1985)AbstractThe main objec otf present paper t iso obtain a finite summatio onf Srivastavas generaltriple hypergeometric serie in terms s of Kampe de Feriets double hypergeometric series.A numbe or f finite sum of Kamps dee Feriets double hypergeometric polynomial in sterms of differen t o kindf singl se hypergeometri oc polynomialf highe r order ares ,obtained. Some known result of Manochs a and Sharm [9]a [10], , Munot [11], Pathan [12],Qureshi [15], Quresh ani d Pathan [16] an d Snvastava [26] ar e deduced as special cases. Aresult of Pathan [13, page 316 (1.2) is als]o corrected here.1. IntroductionA unification of Lauricellas fourteen triple hypergeometri F

A note on hypergeometric polynomials

In a paper which appeared in this journal, Manocha and Sharma [6] obtained some results of Carlitz [4], Halim and Salain [5] and generalized a few of them by using fractional derivatives. The present paper is concerned with some erroneous results of this paper [6]. Many more sums of the product of hypergeometric polynomials are also obtained.

Hypergeometric transformations relating Gauss, Appell and Srivastava–Daoust functions

The object of the present paper is to obtain hypergeometric transformation formulas involving Appells double hypergeometric function of the fourth kind F 4 and Srivastava–Daoust hypergeometric function of three variables, using Laplace-type double integral technique. Watsons summation theorem for Clausenian function 3 F 2 having unit argument is deduced as a special case. A hypergeometric transformation formula for Gauss function 2 F 1 [H. Exton, A Note on a hypergeometric transformation, Bull. Calcutta Math. Soc. 74(1979), pp. 337–340] is also corrected here.

Some bilateral generating relations involving Gegenbauer polynomials

In this paper, we obtain three interesting bilateral generating functions for Gegenbauer polynomials C n b (x) associated with hypergeometric polynomials 2 F 1, 1 F 2 and 3 F 2. Our results are obtained with the help of series rearrangement technique.

Some Srivastava-Brafman Type Generating Relations For A General Class Of Multi-Index And Multi-Variable Gould-Hopper And Dattoli Type Hypergeometric Polynomials

Abstract In this article, we first introduce and study a new family of the multi-index and multi-variable Gould-Hopper and Dattoli type polynomials {Hn(cm, cm-1,…, c3, c2)(a1, a2, …, am} defined by (2.1), which are an extension of different types of Her-mite polynomials defined in section 1. We next consider multi-variable linear, bilinear and bilateral generating relations of the newly defined hypergeometric polynomials, using series iteration techniques. Further, we generalize these generating relations in the forms of multiple series identities involving bounded multiple sequences, Fox-Wright hypergeometric function and Srivastava-Daoust multi-variable hypergeometric function.

APPLICATIONS OF HYPERGEOMETRIC SUMMATION THEOREMS OF KUMMER AND DIXON INVOLVING DOUBLE SERIES

Abstract Using series iteration techniques, we derive a number of general double series identities and apply each of these identities in order to deduce several hypergeometric reduction formulas involving the Srivastava-Daoust double hypergeometric function. The results presented in this article are based essentially upon the hypergeometric summation theorems of Kummer and Dixon.