Morphological Indices of Drought Tolerant of Some Paddy Varieties (Oryza sativa L.) In West Sumatera Using Standard Evaluation System (SES) For Rice

Abstract

Rice is an important food crop that consumed by more than half of the world's population, but almost every year there is decrease rice production in field, this is due availability of land and water as main source of agriculture. Therefore optimization of dry land as agricultural is needed, but many things are of concern to dry land, especially water sources are minimal. Therefore, it is need have rice seeds are suitable and adaptive to dry land, the response of rice plants to drought can observed from physiological, morphological and anatomical changes. This research was conducted in August to December 2018 in research laboratories, wire houses and plant physiology laboratories, Faculty of Mathematics and Natural Sciences, Padang State University. This study was to obtain a drought tolerant morphological index from several paddy seeds in West Sumatera, so indexes showed that rice seeds were tolerant to drought by observing morphological changes, namely leaf rolling (DPD), shoot top index (IKP). ), and plant recorvry (TP) using the SES (Standard Evaluation System) method for rice. Data is processed using cluster analysis with hierarchical analysis methods. The results showed the most resistant varieties to drought stress were’s Baroto, Situ Bagendit, Randah Kuniang, and Harum.

Evaluation of some rice (Oryza sativa L.) genotypes under drought stress conditions by using morphological, physiological and molecular characteristics

“…The values of shoot length ranged from 14.5cm for Sakha 106 control (without PEG) and1.6cm for Sakha 104 under 15% PEG. It was less than control in SAK104, 106 under all PEG treatments and G177 under PEG 10% (Ibrahim, et al, 2019b;Violita andAzhari, 2021, Saha et al, 2019). The highest value under 15% PEG was obtained for Hageen Masry but some disappeared under the high concentrations.…”

“…The analysis of variance was significant (P≤0.05 to P≤ 0.01) or of highly significant differences among the genotypes, PEG concentrations and their interactions for all the studied traits, revealing an appropriate genetic diversity. In this regard, significant differences between rice genotypes under PEG concentrations were recorded for germination% (Ashaduzzaman et al, 2020 andBasal et al, 2020), shoot length (Mardita and Violita, 2018), root length (Leishman and Westoby 1994), leaves number (Karamanos, 1980and Maqsood & Ali, 2007), root number (Hu et al, 2012, chlorophyll a, chlorophyll b (Pandey andShukla, 2015 andIdhan et al, 2018), cart. and proline (Sobahan et al, 2022).…”

“…The highest value under 15% PEG was obtained for Hageen Masry but some disappeared under the high concentrations. PEG treatment prevents shoot elongation because drought stress will affect aspects of growth morphology (Mardita and Violita, 2018), anatomy (Zagoto and Violita 2019) and physiology. Root length was significantly decreased than control in almost genotypes.…”