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Volume 12
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10.3390/plants12010094
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Article

Photosynthetic Plasticity and Stomata Adjustment in Chromosome Segment Substitution Lines of Rice Cultivar KDML105 under Drought Stress

by
Narawitch Lertngim
1,
Mathurada Ruangsiri
1,
Suparad Klinsawang
2,
Pimpa Raksatikan
1,
Burin Thunnom
1,
Meechai Siangliw
1,
Theerayut Toojinda
1 and
Jonaliza Lanceras Siangliw
1,*
1
National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Phahonyothin, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
2
Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen, Nakhon Pathom 73140, Thailand
*
Author to whom correspondence should be addressed.
Plants 2023, 12(1), 94; https://doi.org/10.3390/plants12010094
Submission received: 2 November 2022 / Revised: 14 December 2022 / Accepted: 16 December 2022 / Published: 24 December 2022
(This article belongs to the Special Issue Improvement and Genetic Analysis of Germplasm Resources in Major Crops)
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Abstract

The impact of increasing drought periods on crop yields as a result of global climate change is a major concern in modern agriculture. Thus, a greater understanding of crop physiological responses under drought stress can guide breeders to develop new cultivars with enhanced drought tolerance. In this study, selected chromosome segment substitution lines of KDML105 (KDML105-CSSL) were grown in the Plant Phenomics Center of Kasetsart University in Thailand under well-watered and drought-stressed conditions. Physiological traits were measured by observing gas exchange dynamics and using a high-throughput phenotyping platform. Furthermore, because of its impact on plant internal gas and water regulation, stomatal morphological trait variation was recorded. The results show that KDML105-CSS lines exhibited plasticity responses to enhance water-use efficiency which increased by 3.62%. Moreover, photosynthesis, stomatal conductance and transpiration decreased by approximately 40% and plant height was reduced by 17.69%. Stomatal density tended to decrease and was negatively correlated with stomatal size, and stomata on different sides of the leaves responded differently under drought stress. Under drought stress, top-performing KDML105-CSS lines with high net photosynthesis had shorter plant height and improved IWUE, as influenced by an increase in stomatal density on the upper leaf side and a decrease on the lower leaf side.
Keywords: drought; KDML105; phenomics; photosynthesis; plastic response; stomata density; stomata size; adaxial and abaxial leaf surface drought; KDML105; phenomics; photosynthesis; plastic response; stomata density; stomata size; adaxial and abaxial leaf surface

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MDPI and ACS Style

Lertngim, N.; Ruangsiri, M.; Klinsawang, S.; Raksatikan, P.; Thunnom, B.; Siangliw, M.; Toojinda, T.; Siangliw, J.L. Photosynthetic Plasticity and Stomata Adjustment in Chromosome Segment Substitution Lines of Rice Cultivar KDML105 under Drought Stress. Plants 2023, 12, 94. https://doi.org/10.3390/plants12010094

AMA Style

Lertngim N, Ruangsiri M, Klinsawang S, Raksatikan P, Thunnom B, Siangliw M, Toojinda T, Siangliw JL. Photosynthetic Plasticity and Stomata Adjustment in Chromosome Segment Substitution Lines of Rice Cultivar KDML105 under Drought Stress. Plants. 2023; 12(1):94. https://doi.org/10.3390/plants12010094

Chicago/Turabian Style

Lertngim, Narawitch, Mathurada Ruangsiri, Suparad Klinsawang, Pimpa Raksatikan, Burin Thunnom, Meechai Siangliw, Theerayut Toojinda, and Jonaliza Lanceras Siangliw. 2023. "Photosynthetic Plasticity and Stomata Adjustment in Chromosome Segment Substitution Lines of Rice Cultivar KDML105 under Drought Stress" Plants 12, no. 1: 94. https://doi.org/10.3390/plants12010094

APA Style

Lertngim, N., Ruangsiri, M., Klinsawang, S., Raksatikan, P., Thunnom, B., Siangliw, M., Toojinda, T., & Siangliw, J. L. (2023). Photosynthetic Plasticity and Stomata Adjustment in Chromosome Segment Substitution Lines of Rice Cultivar KDML105 under Drought Stress. Plants, 12(1), 94. https://doi.org/10.3390/plants12010094

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