Physiological Responses of Oil Palm Seedlings to the Drought Stress Using Boron and Silicon Applications

Putra, Eka Tarwaca Susila; Issukindarsyah,; Taryono, Taryono; Purwanto, Benito Heru

doi:10.3923/ja.2015.49.61

Cited by 34 publications

(19 citation statements)

References 36 publications

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“…Data are corroborated by the study of Gong et al (2005), which explained that Si has the ability to decrease transpiration via the cuticle or the stomata, due to its involvement in the regulation of the stomatal movement. These findings are also reinforced by the studies of Zargar and Agnihotri (2013), Putra et al (2015), and Zanetti et al (2016) in maize, oil palm, and cacao plants; they reported that Si application reduced the SD, an important factor to reduce gs, which improved the water status of plants under drought stress. Many studies have described how a minor SD is associated with the high PN and WUE in plants under drought stress conditions, as corroborated by us in our study (Fig.…”

Section: Discussionmentioning

confidence: 61%

Ecophysiological study of SiK impact on Castanea sativa Mill. tolerance to drought stress

Carneiro-Carvalho¹,

Anjos²,

Lousada³

et al. 2020

Photosynt.

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Drought is an abiotic stress that may be aggravated by climate changes with increasingly warmer and drier summers. This is a severe problem in the chestnut crop in Portugal due to its need for water during this time, which is essential for good formation and development of the fruit. Si fertilization is referenced by several authors as important in the tolerance of plants under drought. The experiments were carried out in the field trial and chestnuts were fertilized with 0, 5, 7.5, and 10 mM potassium silicate (SiK), which was applied to the soil and to the leaves and exposed to a non-irrigation and an irrigation phase during the summer. Results indicate that Si fertilization increased the relative water content and water potential, while the transpiration rate, stomatal conductance, and stomatal density were reduced under deficit irrigation in Si-treated plants (10 mM SiK). Moreover, the Si induces a higher photosynthetic activity and vessel frequency with a smaller diameter, promoting a higher relative hydraulic conductivity and a lower vulnerability to cavitation. This work suggests that Si can be used as a potential source to induce drought tolerance in chestnuts.

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Section: Discussionmentioning

confidence: 61%

Ecophysiological study of SiK impact on Castanea sativa Mill. tolerance to drought stress

Carneiro-Carvalho¹,

Anjos²,

Lousada³

et al. 2020

Photosynt.

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“…Previous studies have shown that environmental stress leads to a change in stomatal density and size [ 63 – 67 ]. Supplying Si can change the stomatal density and size of a leaf to enhance the resistance of a plant [ 63 , 64 , 68 , 69 ]. Previous studies have shown that higher stomatal densities and smaller stomatal sizes improved the sensitivity of the stomatal regulation of the plants and improved the stomatal function at similar leaf areas.…”

Section: Discussionmentioning

confidence: 99%

Alleviatory effects of silicon on the foliar micromorphology and anatomy of rice (Oryza sativa L.) seedlings under simulated acid rain

Wang

Zhang

et al. 2017

PLoS ONE

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Silicon (Si) is a macroelement in plants. The biological effects and mitigation mechanisms of silicon under environmental stress have become hot topics. The main objectives of this study were to elucidate the roles of Si in alleviating the effects on the phenotype, micromorphology and anatomy of the leaves of rice seedlings under acid rain stress. The results indicated that the combined or single effects of Si and simulated acid rain (SAR) stress on rice roots depended on the concentration of Si and the intensity of the SAR stress. The combined or single effects of the moderate concentration of Si (2.0 mM) and light SAR (pH 4.0) enhanced the growth of the rice leaves and the development of the mesophyll cells, and the combined effects were stronger than those of the single treatments. The high concentration of Si (4.0 mM) and severe SAR (pH 3.0 or 2.0) exerted deleterious effects. The incorporation of Si (2.0 or 4.0 mM) into SAR at pH values of 3.0 or 2.0 promoted rice leaf growth, decreased necrosis spots, maintained the structure and function of the mesophyll cells, increased the epicuticular wax content and wart-like protuberance (WP) density, and improved the stomatal characteristics of the leaves of rice seedlings more than the SAR only treatments. The alleviatory effects observed with a moderate concentration of Si (2.0 mM) were better than the effects obtained with the high concentration of Si (4.0 mM). The alleviatory effects were due to the enhancement of the mechanical barriers in the leaf epidermis.

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“…increased in vegetative tissues in response to drought [30], while the total soluble protein content was affected by increasing drought severity [31]. Previous results showed that boron (B) and silicon (Si) application could induce physiological resistance of oil palm seedlings to drought stress [32]. The genes involved in cellular nitrogen compound metabolic processes and transmembrane transport are differentially expressed during drought treatments [33].…”

Section: Cold Stress Effects On the Expression Profiles Of Amino Acidmentioning

confidence: 99%

Comparative identification and differential expression pattern of amino acid permease genes in Elaeis guineensis

Cao

Liu

et al. 2019

Biotechnology & Biotechnological Equipment

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Elaeis guineensis is a tropical crop with high oil content, and the nutritional value of oil is very high. Amino acids not only affect the growth and development of plants but also act as intermediate metabolites of oils, which determine the final quality of oils. In this study, eleven amino acid permease genes (EgAAPs) in E. guineensis were identified from the amino acid transporter family. Real-time PCR results showed that seven EgAAPs (EgAAP1, EgAAP2, EgAAP3, EgAAP4, EgAAP6 EgAAP9, and EgAAP10) played an important role in vegetative growth because of their higher expression levels in roots and leaves, but EgAAP5, EgAAP7, EgAAP8 and EgAAP11 were also important for their higher expression levels in flowers or fruits. E. guineensis seedlings were treated with 20% PEG-6000 and 4 C to induce drought stress and cold stress, respectively. The expression of six EgAAPs (EgAAP1, EgAAP2, EgAAP4, EgAAP6, EgAAP8 and EgAAP11) was decreased in both roots and leaves during cold treatment, and only the expression of EgAAP5 was increased in both roots and leaves after 6 h of cold treatment. The expression of six EgAAPs (EgAAP2, EgAAP4, EgAAP7, EgAAP8, EgAAP10 and EgAAP11) was decreased in roots but increased in leaves under PEG treatment, indicating an opposite pattern of expression levels of these EgAAPs in roots and leaves. However, only EgAAP5 had a similar pattern of expression levels between roots and leaves under PEG treatment. The findings provide information on how EgAAPs in E. guineensis are regulated during growth and development, and under various environmental stresses.

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Physiological Responses of Oil Palm Seedlings to the Drought Stress Using Boron and Silicon Applications

Cited by 34 publications

References 36 publications

Ecophysiological study of SiK impact on Castanea sativa Mill. tolerance to drought stress

Ecophysiological study of SiK impact on Castanea sativa Mill. tolerance to drought stress

Alleviatory effects of silicon on the foliar micromorphology and anatomy of rice (Oryza sativa L.) seedlings under simulated acid rain

Comparative identification and differential expression pattern of amino acid permease genes in Elaeis guineensis

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