Exogenous calcium induces tolerance to atrazine stress in Pennisetum seedlings and promotes photosynthetic activity, antioxidant enzymes and psbA gene transcripts

Erinle, Kehinde O.; Jiang, Zhao; Ma, Bingbing; Li, Jinmei; Chen, Yukun; Ur-Rehman, Khalil; Andleeb, Saiqa; Zhang, Ying

doi:10.1016/j.ecoenv.2016.06.035

Cited by 45 publications

(21 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the higher GST activity over time can be related to the high levels of anthocyanins observed and the higher PAL activity at 15 DAEA. Regarding the relationship between Ca and GST activity, Erinle et al (2016) observed that the GST activity increased with Ca application in Ca-protected Pennisetum seedlings in the presence of atrazine. To our knowledge, this is the first study investigating the effect of Ca on the GST activity in grape skin.…”

Section: Resultsmentioning

confidence: 99%

“…For these reasons, there is an increasing interest in obtaining higher accumulation of flavonoid pigments in grape skin, in which they are stored. Anthocyanins are mainly synthesized at the beginning of berry ripening, and their levels can triplicate in a week, with posterior stabilization (FERNÁNDEZ-LÓPEZ et al, 1998). In this sense, the application of ethephon (2-Chloroethylphosphonic acid) in grape berries at ripening stage is an alternative to obtain higher anthocyanin biosynthesis.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ethephon and Calcium Chloride, a Combination That Improves Skin Color of ‘Rubi’ Table Grape

et al. 2018

View full text Add to dashboard Cite

‘Rubi’ table grape has wide acceptance of the consumer market due to its affordable price and attractive color as a function of the accumulation of anthocyanins. However, environmental conditions do not always favor the suitable accumulation of these pigments, resulting in commercial devaluation and nutritional depreciation of fruits. Thus, the present study aimed to investigate the effect of application of different ethephon concentrations, associated or not with CaCl2 application, on the skin color and quality of ‘Rubi’ grape berries. First, specific traits of berries treated with 0, 200, 400, 600, 800 mg L-1 ethephon associated with 1.5% CaCl2 solution were evaluated and pH, titratable acidity (TA), soluble solids (SS), berry firmness, total and reducing soluble sugars, and anthocyanin and flavonol levels were analyzed. This first stage of evaluation revealed no changes in total sugar levels, firmness, SS, TA, SS/TA ratio, and flavonol levels, while changes were detected regarding reducing sugar and anthocyanin levels. Thus, in the second stage, the following variables were evaluated: SS, TA, reducing sugar levels, anthocyanin levels, phenylalanine ammonia lyase (PAL) and glutathione S-transferase (GST) activity of ‘Rubi’ grape berries treated with 0, 200, 400, 600, 800 mg L-1 ethephon, associated or not with 1.5% CaCl2 solution. The results of the present study indicate that ethephon associated with CaCl2 can contribute to improve the post-harvest quality of ‘Rubi’ grape, since this association increased the accumulation of anthocyanins due to the higher activity of PAL and GST, related to biosynthesis and storage of antocyanins, respectively, and increased the levels of reducing sugars (at low ethephon concentrations), not changing other quality aspects. Therefore, a single ethephon application from 200 mg L-1 associated with the application of 1.5% CaCl2 at the final ripening stage, when bunches present from 30 to 50% skin color coverage, was sufficient to produce satisfactory results regarding skin color improvement of ‘Rubi’ grape berries.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ethephon and Calcium Chloride, a Combination That Improves Skin Color of ‘Rubi’ Table Grape

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Under atrazine stress, Ca 2+ application upregulated the expression of D1 protein in Pennisetum giganteum A. Rich., which has been recognized as one of the core subunits in photosystem II (PSII) [64]. Thus, external Ca 2+ treatment might upregulate genes involved in electron transport, carbon assimilation, and PSII photochemical efficiency, which jointly improve the photosynthetic capacity of C. glauca under drought stress.…”

Section: Discussionmentioning

confidence: 99%

Ecophysiological Responses of Calcicole Cyclobalanopsis glauca (Thunb.) Oerst. to Drought Stress and Calcium Supply

Xue

Ren

Long

et al. 2018

Forests

View full text Add to dashboard Cite

Water deficit and high calcium (Ca 2+ ) content and are two typical soil characteristics in the Karst region. However, the problem of whether high Ca 2+ in Karst calcareous soil could increase drought tolerance in calcicole plants has not been solved. We investigated the ecophysiological responses of Cyclobalanopsis glauca (Thunb.) Oerst. cuttings to short-term drought stress and Ca 2+ application. Drought stress (10% PEG-6000) markedly reduced relative water content (RWC) and water potential (WP), and enhanced the levels of reactive oxygen species (ROS) production (H 2 O 2 and O 2•− ) and malondialdehyde (MDA) content in C. glauca leaves. Under drought treatment, exogenous Ca 2+ application (20 mM CaCl 2 ) markedly increased the RWC and WP, and reduced the H 2 O 2 , O 2 •− , and MDA content. Furthermore, water deficit induced a significant increase in the activities of antioxidant enzymes such as peroxidase (POD), superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), glutathione reductase (GR), and glutathione peroxidase (GPX), and increased the accumulation of osmoregulation substances. External Ca 2+ alleviated drought-induced oxidative stress and osmotic stress with further increased activities of antioxidant enzymes, and enhanced the accumulation of osmoregulation substances. In addition, exogenous Ca 2+ treatment alleviated the reduction of the photosynthesis rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), and chlorophyll content (SPAD), and further increased water use efficiency (WUE) under drought stress. This study confirms that exogenouos Ca 2+ application induces improvements in the water status, osmotic adjustment, antioxidant defense, and photosynthesis efficiency of C. glauca under drought stress.Plant ecophysiological characteristics might be changed by soil water deficit. Drought could induce a decrease in the relative water content (RWC) and water potential (WP) of plants [7]. Additionally, it can trigger the overproduction of reactive oxygen species (ROS), resulting in oxidative stress [8,9]. Water deficit can also reduce chlorophyll content, gas exchange parameters, stomatal conductance, and photosystem reaction center activity, resulting in the suppression of photosynthesis [10]. To cope with oxidative stress, plants have established antioxidant defense systems to eliminate ROS, including numerous antioxidant enzymes and non-enzymatic antioxidants [11]. Moreover, plants accumulate certain compatible solutes such as proline, soluble sugar, and glycine betaine to deal with drought stress [12]. Under moderate drought conditions, four Karst adapted plants with different growth forms enhanced water use efficiency (WUE), antioxidant enzymes activities, and osmoregulation substances, indicating the essential roles of these defense systems involved in drought resistance [13].Calcium has been approved to ameliorate the adverse effects of water deficit on plants, which might be related to increased antioxidant enzyme activities and reduced membrane lipid peroxidation [1...

show abstract

“…These indicated that PC-1 (Table 1) and PC-1 (Table 3) were related to the development of the vascular bundle of grafting union. The 7 main indicators of the 17 main indicators in PC-1 (Table 1) and PC-1 (Table 3) (41%) directly were related with calcium signal [POD (Erinle et al 2016), cellulose content (Lin et al 2016), chlorogenic acid content (Ngadze et al 2014), CDPK (Fu et al 2013), CHI , GST (Dulhunty et al 2001), and BRD (Zhou et al 2004)]. Therefore, after grafting, vascular bundle development at the scion may depend on biological responses in which intracellular calcium acts as a second messenger.…”

Section: Discussionmentioning

confidence: 99%

Signaling pathway in development of Camellia oleifera nurse seedling grafting union

Feng

Yang

Chen

et al. 2017

Trees

View full text Add to dashboard Cite

Key message The anatomical and physiological signaling pathways associated with successful scion-rootstock union in nurse seedling grafting of Camellia oleifera propagation are illustrated. Abstract Grafting, the successful union between scion and rootstock, has practical and biological importance. Nurse seedling grafting, as those practiced for Camellia oleifera, often results in high cell division activity and affinity, and is usually associated with significant rootstock and scion anatomical structures changes. However, a comprehensive explanation of signaling pathways, and how they affect graft union development, is still largely unknown. The present study investigates the union formation process in C. oleifera nurse seedling grafts and determines that it consists of six stages, namely, isolation layer formation, rootstock callus differentiation, scion callus differentiation, callus proliferation and connection, cambium differentiation and connection, and conducting tissue differentiation and connection, extending over a period of 35 days. Principal components analyses of the observed changes in physiology and protein expression identified three main factors contributing to the union formation process: cell proliferation, cell differentiation, and vascular bundle development. Further analysis showed that the regulation of the union formation process can be divided into two signaling pathways, namely, calcium and MAPK, which occur during vascular bundle development and cell proliferation and differentiation, respectively.

show abstract

Exogenous calcium induces tolerance to atrazine stress in Pennisetum seedlings and promotes photosynthetic activity, antioxidant enzymes and psbA gene transcripts

Cited by 45 publications

References 77 publications

Ethephon and Calcium Chloride, a Combination That Improves Skin Color of ‘Rubi’ Table Grape

Ethephon and Calcium Chloride, a Combination That Improves Skin Color of ‘Rubi’ Table Grape

Ecophysiological Responses of Calcicole Cyclobalanopsis glauca (Thunb.) Oerst. to Drought Stress and Calcium Supply

Signaling pathway in development of Camellia oleifera nurse seedling grafting union

Contact Info

Product

Resources

About