Source–Sink Communication: Regulated by Hormone, Nutrient, and Stress Cross-Signaling

Yu, Su‐May; Lo, Shuen‐Fang; Ho, Tuan‐Hua David

doi:10.1016/j.tplants.2015.10.009

Cited by 277 publications

(242 citation statements)

References 96 publications

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“…SnRK1-regulated endosperm starch catabolism is required to promote anaerobic metabolism during germination of rice seeds under extreme O 2 deficiency, and management of leaf starch catabolism is critical to submergence survival (Yu et al, 2015). The starchless plastidic PHOSPHOGLUCOMUTASE mutant was used in experiments that demonstrate a requirement for transitory leaf starch catabolism in submerged Arabidopsis rosettes that requires the ERF-VIIs but is independent of SnRK1 (Loreti et al, 2018).…”

Section: Oxygen: Both Metabolic Necessity and Developmental Cuementioning

confidence: 99%

The Dynamic Plant: Capture, Transformation, and Management of Energy

Bailey‐Serres¹,

Pierik²,

Ruban³

et al. 2018

Plant Physiology

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Plants are exquisite in their capacity to convert photons of light through photosynthetic carbon dioxide (CO 2 ) fixation into carbohydrate resources that are assimilated and partitioned from photosynthetic source to sink tissues. The chemical energy gained from photosynthesis includes ATP and NADPH that along with sugars are vital to biosynthetic processes, cell proliferation, biomass production, and reproductive fitness. As in all eukaryotes, plants are dependent upon dioxygen (O 2 ) for efficient production of ATP through aerobic respiration by mitochondria. Therefore, O 2 is crucial for the efficient catabolism of carbohydrates, lipids, and protein into chemical energy in leaves in the light and darkness, as well as in sink tissues. In this Focus Issue, numerous reviews and research articles explore the integration of light, O 2 , and energy metabolism from the cellular to the whole-plant level. The articles analyze molecular, biochemical, physiological, and developmental mechanisms that contribute to the plant's energy balance. A recurrent theme is the integration of light, O 2 , and sugar sensing with signal transduction and gene regulation, resulting in metabolic and developmental plasticity that maximizes available energy for growth. This knowledge expands opportunities to enhance photosynthetic efficiency and finetune energy allocation to maximize yields of crops.

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Section: Oxygen: Both Metabolic Necessity and Developmental Cuementioning

confidence: 99%

The Dynamic Plant: Capture, Transformation, and Management of Energy

Bailey‐Serres¹,

Pierik²,

Ruban³

et al. 2018

Plant Physiology

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“…Meanwhile, it is known that the intensity of photosynthesis is also regulated via signals related with the acceptors (sink), i.e. areas involved in the metabolic activities of growing and reserving (Mokronosov, 1981;Nancy, 1994;Chikov, 2008;Paul and Foyer, 2001;Fatichi et al, 2014;Yu et al, 2015;Rossi et al, 2015). In particular, the latter is confirmed by positive correlations detected between photosynthetic activity and the acceptors' growth indices (relative and absolute growth rate) (Mokronosov, 1981).…”

Section: Introductionmentioning

confidence: 98%

“…The underlying concept of "donor-acceptor" ("source-sink") applied here takes into account that the photosynthesis and yield formation processes directly depend on the activity of a leaf, as a donor (source) of photoassimilates (Rossi et al, 2015;Yu et al, 2015). Meanwhile, it is known that the intensity of photosynthesis is also regulated via signals related with the acceptors (sink), i.e.…”

Section: Introductionmentioning

confidence: 99%

“…It should be mentioned that in a situation when the amount of sugar is not sufficient, growth is not reduced directly, but through regulatory mechanisms, i.e. SNrK1 kinase activation, thus, growth is suppressed and adapted to the donor potency (Lastdrager et al, 2014;Yu et al, 2015). Alternately, when the donor activity and sucrose amount increase, the amount of signal carbohydrate trehalose 6-phosphate (T6P) also increases, which indicates good donor functioning and inhibits the kinase SNrK1 activity, thus stopping the suppression of growth.…”

Section: Introductionmentioning

confidence: 99%

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From an Empirical to Conceptual Modeling View of Energy Crop Productivity

Šimkūnas¹

2018

Appl. Ecol. Env. Res.

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Abstract.When empirical research provides incomplete data, it is often not accepted, especially if the primary data is slightly controversial. This article investigates this situation exactly, where there is little data and quite unexpected results. A conceptual modeling approach is applied here to supplement the empirical research and to examine the yield obtained from the Silphium perfoliatum energy plant under certain environmental conditions in Lithuania. The designed conceptual model is based on an analysis of informational relationships within the "donor-acceptor" ("source-sink") plant (sub)system. It was found, that the chlorophyll-a amount did not affect the yield, what according to the model, may be determined by the different acceptor activity. Nitrogen and potassium influenced the biomass positively, possibly through the activation of acceptor metabolism and assimilate transport, and the consequent signaling on the photosynthetic apparatus (via cytokinin and sugar). Meanwhile, the high phosphate amount in soil negatively influences the yield. A hypothesis of yield limitation by signaling through the high phosphate levels in the case of slowed down photosynthesis is proposed. In addition to determining the causality of the yield formation, the conceptual modeling enables us to make use of limited empirical data to design future experiments, aimed at testing the hypothesis and verifying the model.

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“…Los azucares son uno de los nutrientes que se movilizan durante la senescencia de los órganos vegetativos y se transporta a través del floema hacia otros tejidos, donde además de ser empleados como recursos metabólicos, también actúan como señal de regulación para múltiples procesos del desarrollo (Li and Sheen, 2016;Smeekens, 2000;Yu et al, 2015). Por tanto son un buen candidato a ser la señal móvil entre semillas y SAM o al menos que dicha señal se pueda desencadenar como consecuencia del metabolismo o acumulación de azúcares en las semillas en formación.…”

Section: Mutantes En La Biosíntesis O Degradación De Azúcaresunclassified

La ruta FUL-AP2 y la longevidad de los meristemos en Arabidopsis thaliana. Bases moleculares y potencial biotecnológico

Fernandez¹

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A mis padres RESÚMENESLa ruta FUL-AP2 y la longevidad de los meristemos en Arabidopsis thaliana.Bases moleculares y potencial biotecnológico. RESUMENEl desarrollo de todos los órganos de la planta depende de la actividad de los meristemos y regiones adyacentes. Las plantas monocárpicas presentan un único ciclo reproductivo antes de su senescencia y muerte. La senescencia y muerte de estas plantas está precedida por una parada global de la proliferación de sus meristemos (GPA). De este modo, el número de flores/frutos que producen durante su vida depende de la actividad proliferativa de los meristemos apicales de las ramas y de cuando se produzca el GPA. El estudio de los mecanismos que controlan el GPA, así como un mayor conocimiento de los genes implicados en el mantenimiento de las células meristemáticas durante este proceso, proporcionaría herramientas muy útiles en los programas de mejora de cultivos para la obtención de variedades más productivas.EL GPA es un fenómeno descrito hace más de un siglo para varias plantas monocárpicas, y se han planteado diferentes hipótesis sobre los factores que lo desencadenan. Entre los factores propuestos se encuentran la existencia de relaciones fuente-sumidero o la regulación de la actividad meristemática por parte de los órganos reproductivos en desarrollo. Respecto al papel de los órganos reproductivos está bien definido un papel señalizador de las semillas en desarrollo, ya que la esterilidad de la planta o la poda de los frutos retrasan considerablemente el GPA. Por otro lado, en nuestro grupo se ha desvelado recientemente la que es probablemente la primera ruta genética propuesta de regulación de la longevidad del meristemo en plantas monocárpicas, y que incluye a los factores transcripcionales FRUITFULL (FUL) y APETALA2 (AP2) en el control temporal de este proceso en Arabidopsis thaliana. Esta ruta propone que con la edad los niveles de expresión del miR172 y de FUL aumentan como consecuencia de la reducción del miR156 y aumento de los factores de transcripción SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPLs), que regulan la expresión de FUL. El aumento de la expresión de FUL y del miR172 produce la reducción de los niveles de AP2, que ocasiona la progresiva disminución de la expresión del gen de mantenimiento meristemático WUSCHEL (WUS), y por tanto, el cese de la actividad meristemática y aparición del GPA.En el capítulo 1 de esta tesis doctoral se ha pretendido profundizar en el estudio del control de la longevidad de los meristemos mediante la ruta FUL-AP2, identificando dianas moleculares o interactores de AP2.En el capítulo 2 hemos llevado a cabo el rastreo de diferentes poblaciones mutagenizadas buscando mutantes que a pesar de ser estériles tuvieran un GPA temprano, como punto de partida a la identificación de factores implicados en la vía de señalización entre semillas en desarrollo y meristemo apical, otra de las posibles rutas de regulación del GPA.En el capítulo 3 hemos desarrollado una serie de estrategias biotecnológicas que permiten aumentar la producció...

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Source–Sink Communication: Regulated by Hormone, Nutrient, and Stress Cross-Signaling

Cited by 277 publications

References 96 publications

The Dynamic Plant: Capture, Transformation, and Management of Energy

The Dynamic Plant: Capture, Transformation, and Management of Energy

From an Empirical to Conceptual Modeling View of Energy Crop Productivity

La ruta FUL-AP2 y la longevidad de los meristemos en Arabidopsis thaliana. Bases moleculares y potencial biotecnológico

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