文档介绍：COPLBI-781; NO. OF PAGES 6
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Life in the balance: a work controlling survival of
flooding
Julia Bailey-Serres1,4 and Laurentius ACJ Voesenek2,3,4
Recent reports on responses to flooding, submergence, and production, particularly rice, in flood-prone regions.
low-oxygen stress have ponents in an essential Major steps toward breeding tolerant varieties have been
work that underlies plasticity in growth and made through the characterization of two multigenic loci
metabolism essential for the survival of distinct flooding regimes. that control the capacity to plete submerg-
Here, we discuss growth under severe oxygen-limited ence (SUBMERGENCE 1, SUB1) or rapid outgrowth of
conditions (anaerobic growth) and less oxygen-deficient adverse partial submergence (SNORKEL, SK)[2,3,
underwater conditions (ethylene-driven underwater growth). 4,5]. New SUB1 rice varieties, produced by marker-
Low-oxygen stress causes an energy and carbohydrate crisis assisted breeding, are high yielding even following two
that must be controlled through regulated consumption of weeks plete submergence [6,7]. Similarly, better
carbohydrates and energy reserves. In rice (Oryza sativa L.), low- yields of deepwater rice are anticipated, with other
oxygen stress, energy homeostasis and growth are connected improvements to follow [8]. For example, rice and some
by a calcineur