Hormonal and metabolic regulation of source–sink relations under salinity and drought: From plant survival to crop yield stability

Albacete, Alfonso; Martínez‐Andújar, Cristina; Pérez‐Alfocea, Francisco

doi:10.1016/j.biotechadv.2013.10.005

Cited by 179 publications

(134 citation statements)

References 229 publications

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“…Recently, overexpression of a CWIN gene CIN1 from Chenopodium rubrum in tomato reduced floral and fruit abortion under salinity, likely through enhanced sink activity, which is attributed to increased sucrolytic activity and auxin and cytokinin levels (Albacete et al, 2014a(Albacete et al, , 2014b. These authors further found that the transgenic tomato lines exhibited higher water use efficiency under drought, in part owing to improved carbohydrate metabolic flux in the leaves (Albacete et al, 2015).…”

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confidence: 99%

Cell Wall Invertase Promotes Fruit Set under Heat Stress by Suppressing ROS-Independent Cell Death

2016

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Reduced cell wall invertase (CWIN) activity has been shown to be associated with poor seed and fruit set under abiotic stress. Here, we examined whether genetically increasing native CWIN activity would sustain fruit set under long-term moderate heat stress (LMHS), an important factor limiting crop production, by using transgenic tomato (Solanum lycopersicum) with its CWIN inhibitor gene silenced and focusing on ovaries and fruits at 2 d before and after pollination, respectively. We found that the increase of CWIN activity suppressed LMHS-induced programmed cell death in fruits. Surprisingly, measurement of the contents of H 2 O 2 and malondialdehyde and the activities of a cohort of antioxidant enzymes revealed that the CWINmediated inhibition on programmed cell death is exerted in a reactive oxygen species-independent manner. Elevation of CWIN activity sustained Suc import into fruits and increased activities of hexokinase and fructokinase in the ovaries in response to LMHS. Compared to the wild type, the CWIN-elevated transgenic plants exhibited higher transcript levels of heat shock protein genes Hsp90 and Hsp100 in ovaries and HspII17.6 in fruits under LMHS, which corresponded to a lower transcript level of a negative auxin responsive factor IAA9 but a higher expression of the auxin biosynthesis gene ToFZY6 in fruits at 2 d after pollination. Collectively, the data indicate that CWIN enhances fruit set under LMHS through suppression of programmed cell death in a reactive oxygen species-independent manner that could involve enhanced Suc import and catabolism, HSP expression, and auxin response and biosynthesis.

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confidence: 99%

Cell Wall Invertase Promotes Fruit Set under Heat Stress by Suppressing ROS-Independent Cell Death

2016

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“…In this study, the results demonstrated that ethylene inhibitor application can sustain higher cotton boll dry mass accumulation when these plants are submitted to water deficit whether compared to those untreated. In this sense, recently studies are showing the role of ethylene in carbohydrate balance and its metabolism (Albacete et al, 2014;Carreno-Quintero et al, 2013;Deng et al, 2013). As sucrose is the major form of carbohydrates transported from photosynthetically active source to non-photosynthetic sinks such as reproductive structures and roots, here including flowers and cotton bolls in development, any stress can triggers plants responses to alter this source:sink relation.…”

Section: Discussionmentioning

confidence: 99%

Ethylene Inhibitors Increase Net Assimilation Rate and Cotton Boll Dry Matter Under Drought

Brito¹,

Ferreira²,

Borin³

2014

JAS

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Although the ethylene inhibitors role on reduction rate of boll abscission in cotton plants submitted to drought is being recently reported, its effects on photosynthesis performance and on cotton boll dry matter across the sympodial branch is scarce. Thus, the objective of this study was to evaluate the cotton photosynthesis and its boll dry matter performance across the reproductive branches via positional mapping in plants sprayed with ethylene inhibitors and submitted to water deficit. 1-methylcyclopropene (1-MCP), an inhibitor of ethylene action and aminoethoxyvinylglycine (AVG), an inhibitor of its synthesis, were sprayed on cotton plants alone and in association. . L -1 twice at each seven days. The ethylene inhibitors sustained higher photosynthesis performance and higher boll dry mass across reproductive branches independent of compound, its combination or entries number. Highlight that a AVG (T 2 ) or its 1-MCP association in two entries (T 7 ) showed the best performance for dry matter accumulation, especially in the two first reproductive branches, while they maintained the highest photosynthesis rates at the end of stress period.

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“…Drought represents a frequently occurring abiotic stress impairing plant growth due to a reduction in sink strength of young organs and assimilate accumulation in source leaves [44,45], resulting in premature senescence. It was recently shown that NAC WITH TRANSMEMBRANE MOTIF 1-LIKE 4 (NTL4) is a positive regulator of senescence during drought stress [46].…”

Section: Environmentally Induced Senescencementioning

confidence: 99%

Transcriptional networks in leaf senescence

Schippers

2015

Current Opinion in Plant Biology

128

106

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Hormonal and metabolic regulation of source–sink relations under salinity and drought: From plant survival to crop yield stability

Cited by 179 publications

References 229 publications

Cell Wall Invertase Promotes Fruit Set under Heat Stress by Suppressing ROS-Independent Cell Death

Cell Wall Invertase Promotes Fruit Set under Heat Stress by Suppressing ROS-Independent Cell Death

Ethylene Inhibitors Increase Net Assimilation Rate and Cotton Boll Dry Matter Under Drought

Transcriptional networks in leaf senescence

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