Foliar Potassium-Induced Regulations in Glycine Betaine and Malondialdehyde Were Associated with Grain Yield of Heat-Str
- PDF / 796,379 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 91 Downloads / 197 Views
ORIGINAL PAPER
Foliar Potassium-Induced Regulations in Glycine Betaine and Malondialdehyde Were Associated with Grain Yield of Heat-Stressed Bread Wheat (Triticum aestivum L.) Muhammad Shahid 1,2 & Muhammad Farrukh Saleem 1 & Amna Saleem 3 & Muhammad Sarwar 1 & Haroon Zaman Khan 1 & Abdul Shakoor 1 Received: 30 January 2020 / Accepted: 1 April 2020 # Sociedad Chilena de la Ciencia del Suelo 2020
Abstract Heat stress at reproductive stages of wheat causes grain shriveling. The present study aimed at comparing thermo-sensitivity of terminal stages of wheat and optimization of foliar potassium to alleviate heat and to determine correlation of biochemical attributes with agronomic attributes. The experiment was laid out in a randomized complete block design under split treatment structure and replicated thrice. Main plot was comprised of heat stress (H), viz. H0 = no heat imposition; H1 = heat stress imposition from complete emergence of spike to grain filling initiation, and H2 = heat stress imposition from flowering initiation to grain filling initiation. Foliar potassium (K) sprays consisted of K0 = control (water spray); K15 = 15; K30 = 30; K45 = 45; and K60 = 60 g L−1. Under “H0” similar and more glycine betaine, water relations and lesser malondialdehyde were recorded with 45 and 60 g L−1 K, While 60 g L−1 K proved more beneficial under “H1” and “H2” for these attributes, “H1” proved more damaging compared with “H0” and “H2” for grain yield and yield components, while similar and more improvements in grain yield and yield components were recorded with 45 and 60 g L−1 K compared with other doses. Conclusively, more deleterious responses were observed under “H1” compared with other heat treatments. Application of 40 g L−1 K under “H0” and 60 g L−1 K under heat stress exhibited more remarkable responses. Moreover, a strong association of biochemical attributes with agronomic parameters was recorded. Keywords Lipid peroxidation . Osmo-protectants . Oxidative stress . Phenological stages . Terminal heat . Thermo-sensitivity . Water relations
1 Introduction Continual rise of temperature is threatening wheat production and food security. Area under wheat cultivation around the globe is 218 million hectares which produces 743 million tons Electronic supplementary material The online version of this article (https://doi.org/10.1007/s42729-020-00250-w) contains supplementary material, which is available to authorized users. * Muhammad Farrukh Saleem [email protected] 1
Analytical Laboratory, Department of Agronomy, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan
2
Agronomic Research Station, Bahawalpur 63100, Pakistan
3
Pesticide Quality Control Laboratory Bahawalpur, Faisalabad 63100, Pakistan
grains on annual basis (FAO 2017). Achievement of genetic potential of wheat under climatic skepticism is an arduous task (Chen et al. 2018). Temperature is expected to rise by 0.3 to 4.8 °C till the end of the twenty-first century (IPCC 2014). Incessantly rising environmental temperature is highly detriment
Data Loading...
