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A novel sunshine duration–based photothermal time model interprets the photosensitivity of flower maturity of pecan cultivars

  • Hua-Lin Ye
  • Qun-Ying Jin
  • Hua-Zheng PengEmail author
  • Tang-Jun ZhuEmail author
  • Jian-Jun Shen
  • Guo-Shuai Huang
  • Min Wang
Original Paper
  • 21 Downloads

Abstract

Although it is well-known and established that light plays important roles in plant development, up to now, there is no substantial improvements in how to deal with the light factor of spring phenology under natural condition. By monitoring the local meteorologic data and mature dates of two types (male and female) of flower from four pecan cultivars during 9 years, it was found that the complementary pattern of growing degree day and sunshine duration helped to maintain a threshold of driving force related to the maturity of pecan flower during 9 years. A novel photothermal time model based on the linear combination of growing degree day and sunshine duration was then proposed and validated to interpret the variance of mature dates of pecan cultivars. Comparative analysis showed that the new model had made extremely significant improvements to the traditional thermal time model. In addition, this model introduced the conversion coefficient K, which quantified the effect of light on the flowering drive, and revealed the differences of base temperature among cultivars. This was the first time that sunshine duration instead of photoperiod was adopted to develop into a verified model on spring phenological event of tree species. It will help to model the spring phenologies of other tree species more reasonably.

Keywords

Carya illinoinensis Photothermal time model Phenological model Growing degree day Sunshine duration 

Notes

Acknowledgments

This work was supported by Zhejiang Breeding Program (grant no. 2016C02052-13 to T.J.Z), Zhejiang Provincial Natural Science Foundation of China (grant no. LY17C150001 to H.Z.P and grant no. LY18C160003 to Q.Y.J), Zhejiang Province and Chinese Academy of Forestry Cooperation Projects (grant no. 2016SY04 to T.J.Z).

Supplementary material

484_2019_1787_MOESM1_ESM.xls (606 kb)
ESM 1 (XLS 606 kb)
484_2019_1787_MOESM2_ESM.xls (1.2 mb)
ESM 2 (XLS 1279 kb)

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Copyright information

© ISB 2019

Authors and Affiliations

  • Hua-Lin Ye
    • 1
    • 2
  • Qun-Ying Jin
    • 1
    • 2
  • Hua-Zheng Peng
    • 1
    • 2
    Email author
  • Tang-Jun Zhu
    • 1
    • 2
    Email author
  • Jian-Jun Shen
    • 1
    • 2
  • Guo-Shuai Huang
    • 3
  • Min Wang
    • 4
  1. 1.Institute of Food Science, Zhejiang Forestry AcademyHangzhouChina
  2. 2.Key Laboratory of State Forestry Administration on Forest Food Resources Utilization and Quality ControlHangzhouChina
  3. 3.College of Forestry and BiotechnologyZhejiang A&F UniversityHangzhouChina
  4. 4.Jiande Forestry StationHangzhouChina

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