Aging later but faster: how StCDF1 regulates senescence in Solanum tuberosum

Author:

Shi Li1ORCID,de Biolley Laura1,Shaikh Maroof Ahmed2ORCID,de Vries Michiel E.3ORCID,Mittmann Sybille Ursula4ORCID,Visser Richard G. F.1ORCID,Prat Salome2ORCID,Bachem Christian W. B.1ORCID

Affiliation:

1. Plant Breeding Wageningen University & Research PO Box 386 Wageningen 6700 AJ the Netherlands

2. Center for Research in Agriculture Genomics (CRAG) Barcelona 08193 Spain

3. Solynta Dreijenlaan 2 6703 HA Wageningen the Netherlands

4. Aardevo B.V. Johannes Postweg 8 8308 PB Nagele the Netherlands

Abstract

Summary In potato, maturity is assessed by leaf senescence, which, in turn, affects yield and tuber quality traits. Previously, we showed that the CYCLING DOF FACTOR1 (StCDF1) locus controls leaf maturity in addition to the timing of tuberization. Here, we provide evidence that StCDF1 controls senescence onset separately from senescence progression and the total life cycle duration. We used molecular–biological approaches (DNA‐Affinity Purification Sequencing) to identify a direct downstream target of StCDF1, named ORESARA1 (StORE1S02), which is a NAC transcription factor acting as a positive senescence regulator. By overexpressing StORE1S02 in the long life cycle genotype, early onset of senescence was shown, but the total life cycle remained long. At the same time, StORE1S02 knockdown lines have a delayed senescence onset. Furthermore, we show that StORE1 proteins play an indirect role in sugar transport from source to sink by regulating expression of SWEET sugar efflux transporters during leaf senescence. This study clarifies the important link between tuber formation and senescence and provides insight into the molecular regulatory network of potato leaf senescence onset. We propose a complex role of StCDF1 in the regulation of potato plant senescence.

Funder

China Scholarship Council

Publisher

Wiley

Reference59 articles.

1. Source-Sink Regulation Is Mediated by Interaction of an FT Homolog with a SWEET Protein in Potato

2. Leaf senescence attributes: the novel and emerging role of sugars as signaling molecules and the overlap of sugars and hormones signaling nodes;Asim M;Critical Reviews in Biotechnology,2022

3. Celis‐GamboaBC.2002.The life cycle of the potato (Solanum tuberosum L.): from crop physiology to genetics. PhD thesis Wageningen University and Research Wageningen the Netherlands.

4. High‐density linkage map constructed from a skim sequenced diploid potato population reveals transmission distortion and QTLs for tuber yield and pollen shed;Clot CR;Potato Research,2023

5. Is the onset of senescence in leaf cells of intact plants due to low or high sugar levels?

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