IDEAS home Printed from https://ideas.repec.org/a/gam/jagris/v14y2024i1p109-d1315555.html
   My bibliography  Save this article

Evaluation of Morpho-Physiological Traits of Oat ( Avena sativa L.) under Drought Stress

Author

Listed:
  • Krishna Ghimire

    (Department of Agronomy, Horticulture and Plant Science, South Dakota State University, Brookings, SD 57007, USA)

  • Isabel McIntyre

    (School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85281, USA)

  • Melanie Caffe

    (Department of Agronomy, Horticulture and Plant Science, South Dakota State University, Brookings, SD 57007, USA)

Abstract

The increase in intensity and frequency of drought due to global climate change has increased the urgency of developing crop cultivars suitable for dry environments. Drought tolerance is a complex trait that involves numerous physiological, biochemical, and morphological responses. A better understanding of those mechanisms is critical to develop drought tolerant cultivars. In this study, we aimed to understand the morphophysiological changes at the shoot and root levels in response to drought stress of ten oat genotypes with diverse root morphological characteristics. Twenty-one-day old plants were subjected to drought stress in a greenhouse by withholding water for two weeks. Several characteristics including chlorophyll content, relative water content (RWC), stomatal conductance, stomata number, shoot dry weight (SDW), root dry weight (RDW), root-to-shoot biomass ratio (RSR), root length, root area, and root volume were measured on well-watered, and drought-stressed plants. Grain yield was evaluated by continuing the drought treatment with a drying and rewatering cycle every 15 days until physiological maturity. The water regime had a significant impact on all traits evaluated. A significant interaction between genotype and water treatment was observed for RWC, chlorophyll content, stomatal conductance, stomata number, and grain yield but not for root traits, suggesting that the root system of all genotypes responded similarly to drought stress. Hayden, the cultivar with the lowest reduction in grain yield from the drought treatment, was among the genotypes with the lowest reduction in RWC and chlorophyll content but with a sharp decrease in stomata number, thus indicating that regulating the plant water status and maintaining the photosynthesis level are important for oat plants to maintain grain yield under drought stress. The size of the root system was not correlated with grain yield under drought, but the RWC and grain yield were significantly correlated under drought, thus suggesting that maintaining the RWC is an important characteristic for oat plants to maintain yield under drought stress.

Suggested Citation

  • Krishna Ghimire & Isabel McIntyre & Melanie Caffe, 2024. "Evaluation of Morpho-Physiological Traits of Oat ( Avena sativa L.) under Drought Stress," Agriculture, MDPI, vol. 14(1), pages 1-21, January.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:1:p:109-:d:1315555
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2077-0472/14/1/109/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2077-0472/14/1/109/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. S. Changhai & D. Baodi & Q. Yunzhou & L. Yuxin & S. Lei & L. Mengyu & L. Haipei, 2010. "Physiological regulation of high transpiration efficiency in winter wheat under drought conditions," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 56(7), pages 340-347.
    2. Hafiz Ghulam Muhu-Din Ahmed & Muhammad Sajjad & Mingju Li & Muhammad Abubakkar Azmat & Muhammad Rizwan & Rana Haroon Maqsood & Sultan Habibullah Khan, 2019. "Selection Criteria for Drought-Tolerant Bread Wheat Genotypes at Seedling Stage," Sustainability, MDPI, vol. 11(9), pages 1-17, May.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Gizie Abeje Belay & Zhengbin Zhang & Ping Xu, 2021. "Physio-Morphological and Biochemical Trait-Based Evaluation of Ethiopian and Chinese Wheat Germplasm for Drought Tolerance at the Seedling Stage," Sustainability, MDPI, vol. 13(9), pages 1-23, April.
    2. Hafiz Ghulam Muhu-Din Ahmed & Muhammad Sajjad & Yawen Zeng & Muhammad Iqbal & Sultan Habibullah Khan & Aziz Ullah & Malik Nadeem Akhtar, 2020. "Genome-Wide Association Mapping through 90K SNP Array for Quality and Yield Attributes in Bread Wheat against Water-Deficit Conditions," Agriculture, MDPI, vol. 10(9), pages 1-23, September.
    3. Alireza Pour-Aboughadareh & Reza Mohammadi & Alireza Etminan & Lia Shooshtari & Neda Maleki-Tabrizi & Peter Poczai, 2020. "Effects of Drought Stress on Some Agronomic and Morpho-Physiological Traits in Durum Wheat Genotypes," Sustainability, MDPI, vol. 12(14), pages 1-14, July.
    4. Anjana Dhakal & Chanda Adhikari & Deepika Manandhar & Samikshya Bhattarai & Sony Shrestha, 2021. "Effect of Abiotic Stress in Wheat: A Review," Reviews in Food and Agriculture (RFNA), Zibeline International Publishing, vol. 2(2), pages 69-72, May.
    5. Bipin Rijal & Prakash Baduwal & Madhukar Chaudhary & Sandesh Chapagain & Sushank Khanal & Saugat Khanal & Padam Bahadur Poudel, 2021. "Drought Stress Impacts On Wheat And Its Resistance Mechanisms," Malaysian Journal of Sustainable Agriculture (MJSA), Zibeline International Publishing, vol. 5(2), pages 67-76, January.
    6. Yueping LIANG & Yang GAO & Guangshuai WANG & Zhuanyun SI & Xiaojun SHEN & Aiwang DUAN, 2018. "Luxury transpiration of winter wheat and its responses to deficit irrigation in North China Plain," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 64(8), pages 361-366.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jagris:v:14:y:2024:i:1:p:109-:d:1315555. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.