Responses of physiological parameters, grain yield, and grain quality to foliar application of potassium nitrate in two contrasting winter wheat cultivars under salinity stress

Yanhai Zheng, Xianbin Xu, Matthew Simmons, Chao Zhang, Fengju Gao, Zengjia Li

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

An experiment was conducted to test whether foliar application of KNO3 on wheat in the heading stage could reduce salinity-induced injuries, produce high grain yield, and improve grain quality. Salt-resistant DK961 and salt-sensitive JN17 wheat cultivars under 0 or 100 mM-NaCl conditions were foliarly watered with distilled water or a 10 mM-KNO3 solution. The four treatments included: T1 (CK1), 0 mM NaCl + distilled water; T2, 0 mM NaCl + 10 mM KNO3;T3 (CK2), 100 mM NaCl + distilled water; T4, 100 mM NaCl + 10 mM KNO3. The results indicate that there were no differences (p > 0.05) in plant growth, grain yield, and grain quality between T2 and T1 in both cultivars, but these response variables were significantly lower in T3 than in T1.K+:Na+ ratio, chlorophyll content, photosynthetic capacity, grain yield, flour yield, water absorbance, ash content, dough-development time and dough-stability time were significantly higher in T4 than in T3, while protein concentration, wet-gluten concentration, and antioxidant enzyme activities were lower. Although foliar application of KNO3 on JN17 enhanced plant growth, grain yield, and grain quality, these parameters were still lower in T4 than in T1. Our findings suggest that cultivating the salt-resistant wheat cultivar combined with foliar application of KNO3 at heading stage may alleviate salinity injuries and produce higher grain yield and better grain quality under saline conditions.

Original languageEnglish (US)
Pages (from-to)444-452
Number of pages9
JournalJournal of Plant Nutrition and Soil Science
Volume173
Issue number3
DOIs
StatePublished - Jun 2010
Externally publishedYes

Keywords

  • Antioxidants
  • Gas exchange
  • Kno
  • Nacl
  • Triticum aestivum l

Fingerprint Dive into the research topics of 'Responses of physiological parameters, grain yield, and grain quality to foliar application of potassium nitrate in two contrasting winter wheat cultivars under salinity stress'. Together they form a unique fingerprint.

Cite this