Metals, Crops and Agricultural Productivity: Impact of Metals on Crop Loss

Kotecha, Mitul; Medhavi,; Chaudhary, Shivani; Marwa, Naina; Deeba, Farah; Pandey, Vivek; Prasad, Vishal

doi:10.1007/978-3-030-20732-8_10

Cited by 3 publications

(3 citation statements)

References 193 publications

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“…There are many good reasons to study metal(loid) toxicity in plants, especially in crops. Metal(loid) pollution is increasing globally and can cause large yield losses (e.g., (Kotecha et al, 2019) while dietary intake of metal(loid) contaminated crops is a major contributor to human disease (Renu et al, 2021). In the case of metals that are essential but can also become toxic (e.g., Fe, Cu or Zn) research can help to develop crops to counter the ubiquitous Fe and Zn deficiency that plagues humanity (FAO, 2021; GNR, 2020; Prasad, 2014; WHO, 2013).…”

Section: Introductionmentioning

confidence: 99%

The role of roots and rhizosphere in providing tolerance to toxic metals and metalloids

Podar

Maathuis

2021

Plant Cell & Environment

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Human activity and natural processes have led to the widespread dissemination of metals and metalloids, many of which are toxic and have a negative impact on plant growth and development. Roots, as the first point of contact, are essential in endowing plants with tolerance to excess metal(loid) in the soil. The most important root processes that contribute to tolerance are: adaptation of transport processes that affect uptake efflux and long‐distance transport of metal(loid)s; metal(loid) detoxification within root cells via conjugation to thiol rich compounds and subsequent sequestration in the vacuole; plasticity in root architecture; the presence of bacteria and fungi in the rhizosphere that impact on metal(loid) bioavailability; the role of root exudates. In this review, we provide details on these processes and assess their relevance on the detoxification of arsenic, cadmium, mercury and zinc in crops. Furthermore, we assess which of these strategies have been tested in field conditions and whether they are effective in terms of improving crop metal(loid) tolerance.

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Section: Introductionmentioning

confidence: 99%

The role of roots and rhizosphere in providing tolerance to toxic metals and metalloids

Podar

Maathuis

2021

Plant Cell & Environment

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“…Chromium is one of the heavy metals that are naturally occurring trace elements of soil and over accumulation of these trace elements in agricultural soil become major threat to food safety in several parts of the world (Ifon et al, 2019: Farooq et al, 2018. Excessive use of fertilizers and pesticides, leather tanning and mining causing high level of chromium contents in agricultural soils (Kotecha et al, 2019;Ulhassan et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Melatonin induced changes in photosynthetic efficiency as probed by OJIP associated with improved chromium stress tolerance in canola (Brassica napus L.)

Ayyaz

Amir

Umer

et al. 2020

Heliyon

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Chromium toxicity is considered as a major problem for agricultural soil that reduced crop productivity by affecting photosynthetic tissues. Exogenous application of melatonin can alleviate the adverse effects of chromium toxicity on plant growth. However, little is known about its effect on thylakoidal protein complexes responsible for conversion of solar energy to biochemical energy. Chlorophyll fluorescence a transients considered one of the best non-invasive and rapid method for the evaluation of photosynthetic (Photosystem II) efficiency of plants and plant health under environmental stress conditions. In the present study, three-week old plants of two canola cultivars AC-Excel and DGL were applied to melatonin (0, 1, 5, 10 μM) when grown under chromium stress (0, 50 and 100 μM) for further two weeks. Chromium stress reduced the growth (fresh and dry weights of shoots and roots) of both canola cultivars and exogenous application of 5 and 10 μM melatonin improved the growth of canola at 50 or 100 μM chromium stress. This improvement was greater in cv DGL than in AC-Excel. Increasing chromium decreased the photosynthetic pigments (chlorophyll a and chlorophyll b ). However, 5 and 10 μM melatonin application improved chlorophyll a at 50 μM chromium stress. Structural stability and efficiency of photosystem II (PSII) measured as performance index (PI ABS ) and ratios of fluorescence (Fv/Fm, Fv/Fo) Fv decreased due to chromium stress. JIP-test parameters showed that chromium stress increased the absorption and trapping fluxes with decrease in electron transport fluxes which caused the damage to reaction centers (RC), detachment of oxygen evolving complex (OEC) from RC or inefficiency of electron transfer from OEC to RC. Such adverse effects were greater in cv AC-Excel. However exogenous application of melatonin improved PI ABS , electron transport per reaction center (ET/RC), reduced variable fluorescence at J step (V J ) reflecting melatonin protected PSII from chromium stress induced damage by protecting OEC. Thus, OJIP fluorescence transients are quite helpful for understanding the intersystem electron transport beyond photosystem II in canola cultivars due to melatonin application under chromium stress. Findings Exogenous application of melatonin alleviated toxic effects of chromium on plant growth of canola by modulating photosynthesis, enhanced photosystem II efficiency and regulation of electron transport flux to protect photo-inhibition of PSII from oxidative damage.

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“…Among all heavy metals chromium is one of the toxic heavy metal causing severe threat to food security for many developing countries including Pakistan. Excessive use of fertilizers and pesticides, leather tanning, mining, natural disasters including volcanic eruption and weathering of rocks causing high level of chromium contents in agricultural soils (Kotecha et al, 2019). It has been found that chromium affects the physiological processes of plants mainly stunted growth, chlorosis and wilting of leaves, photosynthesis and roots damage, reduction in nutrients uptake ultimately causes death (Aparicio et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Differential responses of exogenous melatonin on growth, photosynthesis and antioxidant defence system in two Brassica napus L.cultivars under chromium stress

Ayyaz¹,

Farooq²,

Kanwal³

et al. 2020

IJEAB

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Rapid industrialization throughout the world during last few decades causing high chromium resulted widespread of agricultural soil contamination. The increased chromium contents beyond permissible level in some agricultural land areas increasing widespread concern about food safety.This study was carried out for evaluation of metal toxicity damage and its possible mitigation and improved photosynthetic efficiency by melatonin treatment in canola plants exposed to four melatonin levels (0,1,5,10µM) treated with chromium stress (0,50,100µM) for two days.Chlorophyll fluorescence a transients considered one of the best tool for photosynthetic (photosystem II) efficiency analysis of two canola cultivars Ac-Excel and DGL with or without melatonin treatment against chromium stress analyzed by using OJIP test (at different time scale) chromium treated and non-treated plants. Enhanced ROS scavenging antioxidants enzymes (SOD, POD, APX,CAT) and H2O2, MD Aactivity photo synthetic efficiency was observed against chromium stress. DGL cultivar showed greatly affected and showed maximum reduction in performing index of photosystem II and yield for primary photochemistry as compared to chromium treated and non-treated plants as compared to Ac-Excel. Performing index primarily comprises of active number of reaction centers as per absorption, primary photochemistry yield and efficiency of electron transfer in electron transport chain activities were observed high in Ac-Excel cultivar. However exogenous application of melatonin protected the oxygen evolving complex of PSII and helped out in maintaining PSII activity. Thus OJIP fluorescence transients are quite helpful for understanding the intersystem electron transport beyond photosystem II response of canola cultivars in chromium stress. Findings: Exogenous application of Melatonin can improve plant growth and development in heavy metalstress by modulation of photosynthesis in terms of enhanced photosystem II efficiency and redox potential in certain environmental stress conditions.

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Metals, Crops and Agricultural Productivity: Impact of Metals on Crop Loss

Cited by 3 publications

References 193 publications

The role of roots and rhizosphere in providing tolerance to toxic metals and metalloids

The role of roots and rhizosphere in providing tolerance to toxic metals and metalloids

Melatonin induced changes in photosynthetic efficiency as probed by OJIP associated with improved chromium stress tolerance in canola (Brassica napus L.)

Differential responses of exogenous melatonin on growth, photosynthesis and antioxidant defence system in two Brassica napus L.cultivars under chromium stress

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