Exogenous-osmoprotectant of Casuarina equisetifolia leaf extract enhancing the root anatomical adaptations of Indonesian local rice under drought

Salsinha, Yustina Carolina Febrianti and Puspitawati, Rinie Pratiwi and Purwestri, Yekti Asih and Rachmawati, Diah and Indradewa, Didik and Bashri, Ahmad and Prastyaningtias, Sisca Desi and Kumalasari, Nirma (2024) Exogenous-osmoprotectant of Casuarina equisetifolia leaf extract enhancing the root anatomical adaptations of Indonesian local rice under drought. Journal of Crop Science and Biotechnology. ISSN Electronic ISSN 2005-8276 Print ISSN 1975-9479

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Abstract

Proline is widely distributed in higher plants. In this study, the function of proline as an osmoprotectant in maintaining
cell osmotic stability and structural integrity during drought was analyzed in rice roots. The cultivar of Boawae Seratus
Malam(BSM), Gogo Jak(GJ), Kisol(KM), Situ Bagendit(SB) and Ciherang(CH) were exposed to the fraction of transpirable soil water (FTSW) method with FTSW 1 level (control), and FTSW 0.2 (drought) with a combination of exogenous
osmoprotectant from Casuarina equisetifola leaves extract in three levels: 0%(low), 50%(moderate), and 100%(high).
The root anatomical characteristics were analyzed using the paraffin embedding method. Plants undergo root structural
changes when exposed to drought. In plants without exogenous osmoprotectant, the epidermal width was in the range
of 20 to 30 μm. GJ and SB cultivars showed shrinking in size by 10 to 20 μm in epidermis when exposed to moderate
osmoprotectants and increased by 15 to 30 μm in high osmoprotectants. Under drought and exogenous osmoprotectants,
the root diameter, root area, cortex radius, vascular cylinder area, number of metaxylem, and diameter and width area of
metaxylem showed a significant positive correlation. The epidermal and sclerenchyma thickness and the amount of xylem
tend to show non-significant response under drought and osmoprotectants. These changes in root anatomical structure are
presumed caused by amino acid compounds, particularly proline in exogenous osmoprotectants acting as a signaling molecule and cell wall protein hydrolysate as well as an inducer for the activation of genes in the biosynthesis of hormones
and proteins included in the formation of the cell wall and cytoskeleton during root vegetative growth

Item Type: Article
Additional Information: Cited by: 0
Uncontrolled Keywords: Anatomical analysis · Compatible solute · Drought adaptation · Oryza sativa · Structural adaptation
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Biology > Undergratuate Program in Biology
Depositing User: Ekowati Purwandari Purwandari
Date Deposited: 30 Sep 2024 05:04
Last Modified: 30 Sep 2024 05:04
URI: https://ir.lib.ugm.ac.id/id/eprint/6389

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