Aminoethoxyvinylglycine (AVG) ameliorates waterlogging-induced damage in cotton by inhibiting ethylene synthesis and sustaining photosynthetic capacity

Ullah Najeeb*, Brian J. Atwell, Michael P. Bange, Daniel K. Y. Tan

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    40 Citations (Scopus)

    Abstract

    In this glasshouse study, we investigated the mechanisms of aminoethoxyvinylglycine (AVG)-induced waterlogging tolerance in cotton. Two cotton cultivars Sicot 71BRF (moderately waterlogging tolerant) and LA 887 (waterlogging sensitive) were grown in a clay-loam soil, and exposed to waterlogging at early squaring stage (53 days after sowing). One day prior to waterlogging, shoots were sprayed with AVG (ReTain®, 830 ppm). Continuous waterlogging for 2 weeks accelerated the shedding of leaves and fruits. As the duration of waterlogging increased, shoot growth rate, biomass accumulation, photosynthesis (Pn) and stomatal conductance (gs) were all reduced. Growth of LA 887 was more severely impaired than Sicot 71BRF, with a decline in leaf Pn and gs after just 4 h of waterlogging. Waterlogging inhibited allocation of nitrogen (N) to the youngest fully expanded leaves, photosynthesis and biomass accumulation, while it accelerated ethylene production promoting leaf and fruit abscission. AVG blocked ethylene accumulation in leaves and subsequently improved leaf growth, N acquisition and photosynthetic parameters. In addition, AVG enhanced fruit production of both cotton cultivars under waterlogged and non-waterlogged conditions. Higher ethylene production in cotton is linked with fruit abscission, implying that AVG-induced ethylene inhibition could potentially limit yield losses in waterlogged cotton.

    Original languageEnglish
    Pages (from-to)83-98
    Number of pages16
    JournalPlant Growth Regulation
    Volume76
    Issue number1
    DOIs
    Publication statusPublished - 1 May 2015

    Keywords

    • Ethylene
    • Fruit shedding
    • Leaf wilting
    • Nutrient acquisition
    • Photosynthesis
    • Waterlogging

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