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Functional Plant Biology Functional Plant Biology Society
Plant function and evolutionary biology
RESEARCH ARTICLE

Analysis of chlorophyll fluorescence parameters as predictors of biomass accumulation and tolerance to heat and drought stress of wheat (Triticum aestivum) plants

Oksana Sherstneva https://orcid.org/0000-0001-8497-7676 A , Andrey Khlopkov A , Ekaterina Gromova A , Lyubov Yudina https://orcid.org/0000-0002-6702-2445 A , Yana Vetrova A , Anna Pecherina A , Darya Kuznetsova A , Elena Krutova B , Vladimir Sukhov https://orcid.org/0000-0002-8712-9127 A and Vladimir Vodeneev https://orcid.org/0000-0002-3726-5577 A *
+ Author Affiliations
- Author Affiliations

A Department of Biophysics, Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod 603950, Russia.

B Agronomic Faculty, Nizhny Novgorod State Agricultural Academy, Nizhny Novgorod 603107, Russia.

* Correspondence to: v.vodeneev@mail.ru

Handling Editor: Suleyman Allakhverdiev

Functional Plant Biology 49(2) 155-169 https://doi.org/10.1071/FP21209
Submitted: 20 July 2021  Accepted: 3 November 2021   Published: 24 November 2021

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Agricultural technologies aimed at increasing yields require the development of highly productive and stress-tolerant cultivars. Phenotyping can significantly accelerate breeding; however, no reliable markers have been identified to select the most promising cultivars at an early stage. In this work, we determined the light-induced dynamic of chlorophyll fluorescence (ChlF) parameters in young seedlings of 10 wheat (Triticum aestivum L.) cultivars and evaluated potency of these parameters as predictors of biomass accumulation and stress tolerance. Dry matter accumulation positively correlated with the effective quantum efficiency of photosystem II (ΦPSIIef) and negatively correlated with the half-time of ΦPSIIef reaching (t1/2(ΦPSIIef)). There was a highly significant correlation between t1/2(ΦPSIIef) and dry matter accumulation with increasing prediction period. Short-term heating and drought caused an inhibition of biomass accumulation and photosynthetic activity depending on the stressor intensity. The positive correlation between the ΦPSII dark level (ΦPSIId) in young seedlings and tolerance to a rapidly increasing short-term stressor (heating) was shown. In the case of a long-term stressor (drought), we revealed a strong negative relationship between tolerance and the level of non-photochemical fluorescence quenching (NPQ). In general, the results show the potency of the ChlF parameters of young seedlings as predictors of biomass accumulation and stress tolerance.

Keywords: chlorophyll fluorescence, drought, heat stress, phenotyping, plant breeding, prediction, Triticum aestivum, wheat.


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