Waterproofing Crops: Effective Flooding Survival Strategies

Bailey‐Serres, Julia; Lee, Seung Cho; Brinton, Erin

doi:10.1104/pp.112.208173

Cited by 389 publications

(331 citation statements)

References 115 publications

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“…These authors found concentrations up to three times higher in the elongation zone (roots) compared to the concentrations found in the mature part (shoot). Bailey-Serres et al (2012) observed that the plant with a quiescent response had higher antioxidant activity, as well as lower oxidative damage in the submerged tissues.…”

Section: Discussionmentioning

confidence: 86%

Physiological Responses to Hypoxia and Manganese in Eucalyptus Clones with Differential Tolerance to Vale do Rio Doce Shoot Dieback

Harguindeguy

Castro

Novais

et al. 2018

Rev. Bras. Ciênc. Solo

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ABSTRACT:Vale do Rio Doce shoot dieback (VRDSD) is an anomaly whose cause seems to be associated with hypoxic conditions and their consequences (excess Mn and Fe) triggered by elevation of the water table in areas with poor drainage. Different plants have distinct survival strategies under this form of stress. The objective of this study was to understand the physiological responses involved in the differential tolerance of eucalyptus clones to VRDSD and their relationship to hypoxia and excess Mn. A hydroponic experiment was carried out using a 2 × 2 × 2 factorial arrangement, two eucalyptus clones with different levels of tolerance to VRDSD (sensitive Urograndis hybrid -1213; and the tolerant Rio Claro hybrid -Eucalyptus grandis x unknown -2719), two concentrations of O 2 (8 and 4 mg L -1 ), and two Mn concentrations (1.39 and 300 mg L -1 ) in a randomized block design (RBD) with three replicates. Forty-day-old clones were maintained in Clark nutrient solution for 30 days. After this period, the treatments were applied for 11 days. Plant gaseous exchange shoot and root production, and the quantity of enzymes related to oxidative stress in leaves and roots were evaluated. In the tolerant clone, reactive oxygen species (ROS) were produced under hypoxic conditions, accompanied by reduction in production of dry matter, malondialdehyde (MDA), and in activity of the enzyme alcohol dehydrogenase (ADH). However, this clone had greater production of superoxide dismutase (SOD) under these conditions, an enzyme responsible for detoxification of ROS, which acts as part of the Low Oxygen Quiescence Syndrome (LOQS). In contrast, sensitive clones did not exhibit expressive reductions in growth or changes in the leaf/root ratio. These clones formed large quantities of adventitious roots and had high levels of MDA and ADH and low levels of SOD. Therefore, sensitive clones appear not to be prepared for detoxification of ROS and other toxic metabolites, but rather adopt morphological escape mechanisms, the Low Oxygen Escape Syndrome (LOES), in response to hypoxia. Thus, the period of soil waterlogging may cause the death of large numbers of roots in sensitive clones, limiting their ability to absorb water and nutrients and culminating in the death of these plants. Excess Mn seems to aggravate the damage caused by hypoxia, but it is not the causal agent of VRDSD.

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Section: Discussionmentioning

confidence: 86%

Physiological Responses to Hypoxia and Manganese in Eucalyptus Clones with Differential Tolerance to Vale do Rio Doce Shoot Dieback

Harguindeguy

Castro

Novais

et al. 2018

Rev. Bras. Ciênc. Solo

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“…These findings suggest that cell division and growth are suppressed in the stem upon flooding, such that this tissue enters a state of quiescence. Adhering to a quiescent strategy regarding shoot growth has been shown to be beneficial for plant survival under longterm flooding conditions, potentially because more energy may be available for basal cellular functions and physiological acclimation (Bailey-Serres et al, 2012). The increased cell growth-and division-related activity of AR primordia after 24 h of flooding precedes visual growth of the primordia, but is in accordance with the finding that AR activation is triggered within 24 to 48 h, after which outgrowth occurs even if the water level is lowered (Dawood et al, 2014).…”

Section: Increased Cellular Activity Of Ar Primordia and Quiescence Omentioning

confidence: 99%

“…Flooding is among the most commonly occurring abiotic stress factors that affect plant growth and performance (Bailey-Serres et al, 2012). The primary effect of this stressor is a slower gas diffusion (about 10,000-fold less in water than in air; Armstrong et al, 1991), which leads to reduced gas exchange between the plant and its environment, thereby disturbing internal concentrations of oxygen, carbon dioxide, and ethylene (Bailey-Serres and Voesenek, 2008).…”

mentioning

confidence: 99%

A Co-Opted Hormonal Cascade Activates Dormant Adventitious Root Primordia upon Flooding in Solanum dulcamara

et al. 2016

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“…Typically, the increase in glycolytic flux is coupled with the regeneration of NAD C by the fermentation of pyruvate to ethanol. 3 Long-term, however, the ethanol produced has damaging consequences for cell integrity and survival. 4 In addition, ethanol diffuses out of cells, depleting their carbon reserves.…”

Section: Introductionmentioning

confidence: 99%

Regulation of poly(A) RNA retention in the nucleus as a survival strategy of plants during hypoxia

2016

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Last finding indicates that post-transcriptional processes are significant in low-oxygen conditions, but their nature is poorly understood. Here, we localized poly(A) RNA and mRNA coding proteins involved and not involved with resistance to hypoxia in Lupinus luteus and Arabidopsis thaliana during submergence and after recovery of aerobic conditions. We showed a strong nuclear accumulation of poly(A) RNA and 6 of 7 studied mRNAs with a concurrent strong reduction in RNA polymerase II transcription during hypoxia. In this study, the nucleus did not accumulate mRNA of the ADH1 (alcohol dehydrogenase 1) gene, which is a core hypoxia gene. The RNA accumulation in the nucleus is among the mechanisms of post-transcriptional gene regulation that prevents translation. However re-aeration was accompanied by a strong increase in the amount of the mRNAs in the cytoplasm and a simultaneous decrease in nuclear mRNAs. This finding indicates that the nucleus is a storage site for those of mRNAs which are not involved in the response to hypoxia for use by the plants after the hypoxic stress. In this study, the highest intensity of RNA accumulation occurred in Cajal bodies (CBs); the intensity of accumulation was inversely correlated with transcription. Under hypoxia, ncb-1 mutants of Arabidopsis thaliana with a complete absence of CBs died sooner than wild type (WT), accompanied by a strong reduction in the level of poly(A) RNA in the nucleus. These results suggest that the CBs not only participate in the storage of the nuclear RNA, but they also could take part in its stabilization under low-oxygen conditions.

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Waterproofing Crops: Effective Flooding Survival Strategies

Cited by 389 publications

References 115 publications

Physiological Responses to Hypoxia and Manganese in Eucalyptus Clones with Differential Tolerance to Vale do Rio Doce Shoot Dieback

Physiological Responses to Hypoxia and Manganese in Eucalyptus Clones with Differential Tolerance to Vale do Rio Doce Shoot Dieback

A Co-Opted Hormonal Cascade Activates Dormant Adventitious Root Primordia upon Flooding in Solanum dulcamara

Regulation of poly(A) RNA retention in the nucleus as a survival strategy of plants during hypoxia

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