Canopy Temperature and Chlorophyll Content are Effective Measures of Drought Stress Tolerance in Durum Wheat

Jokar, Fereshteh; Karimizadeh, Rahmatollah; Masoumiasl, Asad; Fahliani, Reza Amiri

doi:10.15835/nsb10410288

Cited by 6 publications

(7 citation statements)

References 33 publications

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“…It has been reported that with increasing drought stress, canopy temperature increased. However, CTD decreased (i.e., the difference between Tc and Ta decreases or the Tc and Ta were close to each other) and foliar application with silicon increased CTD significantly in wheat (Jokar et al 2018). Our study indicated that the lower the CTD, the higher the yield, making it, consistent with the findings of some researchers (Mohammadi et al 2011).…”

Section: Discussionsupporting

confidence: 90%

Impact of drought stress and stress modifiers on water use efficiency, membrane lipidation indices, and water relationship indices of pot marigold (Calendula officinalis L.)

Gholinezhad

2020

Braz. J. Bot

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This study was conducted as a factorial layout based on completely randomized design in three replications in the 2018. The experimental factors included irrigation intervals with 4 levels (3, 6, 9, and 12 days) and drought stress modifiers at four levels (control (non-spraying), spraying with salicylic acid (2 mM), Glycine betaine (5 mM), and zinc sulfate (5 g L −1). The results indicated that the effect of different levels of drought stress and stress modifiers on yield, water use efficiency, membrane lipidation indices, and water relationship indices were significant. The highest water use efficiency based on dry yield (WUE DY) (2.33 kg m −3) and water use efficiency based on essential oil yield (WUE EOY) (0.22 kg m −3) were obtained from irrigation intervals of three days. With increasing irrigation interval from three days to 12 days, dry yield, leaf water content, WUE EOY , cellular membrane stability (CMS), membrane stability index (MSI), total chlorophyll, chlorophyll index, canopy temperature depression (CTD), and relative water content decreased. However, injury index (I), water saturation deficit (WSD), osmotic potential (OP), electrolyte leakage (EL), essential oil percentage, and leaf temperature increased significantly. It seems that at all levels of irrigation, spraying with glycine betaine compared to other modifiers was more effective in increasing WUE DY , WUE EOY , CMS, MSI, total chlorophyll and relative water content, and decrease in I and WSD and EL. Based on the findings, it can be stated that with increasing the irrigation intervals, quantitative and qualitative yields of the pot marigold plant are reduced. The application of drought stress modifiers can reduce the effects of drought stress on this plant, thereby raising WUE DY and WUE EOY .

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Section: Discussionsupporting

confidence: 90%

Impact of drought stress and stress modifiers on water use efficiency, membrane lipidation indices, and water relationship indices of pot marigold (Calendula officinalis L.)

Gholinezhad

2020

Braz. J. Bot

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“…3). The water spenders have higher stomatal conductance and lose water through transpiration, whereas water savers have conservative water use on account of lower stomatal conductance or early closure of stomata and as such have hotter canopies (Sofi et al 2019).A strong positive association between grain yield of durum wheat and canopy temperature depression under moisture-stressed conditions was reported by Jokar et al (2018) indicating that lines which maintained cooler canopies produced higher yields. Thus, it may be suggested that cooler canopy temperature (high CTD) is an indication of enhanced capacity of a plant to take up soil moisture.…”

Section: Resultsmentioning

confidence: 99%

Selection of Surrogates For Drought Resilience In Temperate Maize (Zea Mays L.)

Yousuf¹,

Dar²,

Dar³

et al. 2022

Bangladesh J. Bot.

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Drought is one of the major constraints affecting the economic yield of maize worldwide. Present study was carried out to select the surrogates for drought resilience in 70 maize landraces collected from diverse agro-ecologies of Kashmir Himalayas. Significant variation was observed among the genotypes for all the traits under well-watered and drought conditions. Due to the drought stress, the highest reduction was observed for the canopy temperature (175.18%), followed by root volume (69.77%), top root biomass (69.1%), shoot biomass (67.2%), bottom root biomass (53.75%), chlorophyll content (22.85 SPAD units) and shoot height (21.63%). The reduction was also recorded for other traits like shoot to total biomass ratio (2.70%), relative water content (13.42 %), cell membrane stability (17.33%) and rooting depth (19.86%). Root to total biomass ratio was found to increase in response to drought stress (7.69%). A positive significant correlation was observed between grain yield and root volume, top root biomass, bottom root biomass, rooting depth, root to total biomass, chlorophyll content, cell membrane stability, canopy temperature depression and relative water content. These can be used for selection of appropriate surrogates of drought tolerant genotypes. The landraces viz., KD-L35, KD-L37, KD-L19, KD-L23, KD-L17, KD-L21, KD-L46, KD-L43, KD-L29, KD-L25 and KD-L38 showed promising performance under drought for most of the surrogates identified. The landraces selected can be used as sources of novel and/or favourable alleles to breed for climate resilient maize cultivars. Bangladesh J. Bot. 51(3): 487-498, 2022 (September)

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“…The coefficient of variation of CTD in different studies ranges from middle (10-14 % (Sharma P. et al, 2017;Jokar et al, 2018)) to high (26-43 % (Kumar et al, 2017;Sharma D. et al, 2018)). Dryland conditions make CTD values negative (Thapa et al, 2018) and increase genotypic differences (Pinto et al, 2010).…”

Section: Variation and Heritability Of Ctdmentioning

confidence: 99%

Canopy temperature depression for droughtand heat stress tolerance in wheat breeding

Лепехов

2022

Vestn. VOGiS

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An infrared thermometer was first used to assess drought and heat tolerance in plant breeding more than 40 years ago. Soon afterward, this method became widely used throughout the world. However, Russia has not yet applied the described method for evaluating stress tolerance. This paper presents an overview of using infrared thermometry in plant breeding. Taking wheat as an example, it shows major advantages and disadvantages of canopy temperature depression (CTD) values measured by the infrared thermometer. The paper also demonstrates that genotypes with higher CTD values, and therefore with a lower canopy temperature, use more available soil moisture under drought stress to cool the canopy by transpiration. It refers to CTD as an integrative trait that reflects an overall plant water status. Its coefficient of variation lies in the interval of 10 to 43 %. A large number of publications illustrate a close relation between CTD values and yield and indicate a high heritability of the former. Meanwhile, the same works show that yield has a higher heritability. Moreover, some researchers doubt that CTD should be used in applied wheat breeding as there are many factors that influence it. CTD has a high correlation with other traits that reflect plant water status or their adaptation to drought or heat stress. Quantitative trait loci (QTLs) associated with CTD are localized in all chromosomes, except for 3D. These QTLs often explain a small part of phenotypic variance (10–20 %, more likely less than 10 %), which complicates the pyramiding of canopy temperature genes through marker-assisted selection. The paper concludes that the evaluation of CTD appears to be a reliable, relatively simple, labor-saving, objective, and non-invasive method that sets it apart from other methods as well as shows the best results under terminal drought and heat stress conditions.

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Canopy Temperature and Chlorophyll Content are Effective Measures of Drought Stress Tolerance in Durum Wheat

Cited by 6 publications

References 33 publications

Impact of drought stress and stress modifiers on water use efficiency, membrane lipidation indices, and water relationship indices of pot marigold (Calendula officinalis L.)

Impact of drought stress and stress modifiers on water use efficiency, membrane lipidation indices, and water relationship indices of pot marigold (Calendula officinalis L.)

Selection of Surrogates For Drought Resilience In Temperate Maize (Zea Mays L.)

Canopy temperature depression for droughtand heat stress tolerance in wheat breeding

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