Analysis on drought stress of Longjing tea seedlings based on slope fluorescence index

Bingqi Si; Min Jing; Ningchao Jiang

doi:10.1117/12.2652142

23 January 2023 Analysis on drought stress of Longjing tea seedlings based on slope fluorescence index

Bingqi Si, Min Jing, Ningchao Jiang

Proceedings Volume 12557, AOPC 2022: Optical Sensing, Imaging, and Display Technology; 125572N (2023) https://doi.org/10.1117/12.2652142
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

Drought stress is the main factor affecting plant grown and development. Chlorophyll fluorescence was chosen as research object to study the effects of drought stress on the growth of Longjing tea seedlings crops. A chlorophyll fluorescence collection system was designed with LED, CCD and filter. Longjing tea seedling with good growth were selected for drought treatment. The tea seedlings should be dark treatment before each experiment. Using LED lamps actively induced the emission fluorescence of tea seedlings, and the images were collected in the same time period for 8 consecutive days. The chlorophyll fluorescence quenching curve was drawn through the mean gray value of the images after preprocessing with median filter. We proposed a new method for evaluating fluorescence quenching curves using slope index, named the slope fluorescence index (SFI). The range of the gray scale mean at the same time in 1-8 days is calculated, the relative errors of range were calculated over the selected time range and determining the time range of range stability. Within the time range, correlation model between each point on the curves and the stress days was established to find a point with the largest correlation coefficient R 2 . The results showed that there was the highest correlation between the SFI of fluorescence quenching curve at 327s and the days of drought stress (determinant coefficient R 2=0.94021). Slope fluorescence index (SFI) is used to evaluate chlorophyll fluorescence quenching curve, which will provide a new idea for monitoring plant growth under stress.

Citation Download Citation

Bingqi Si, Min Jing, and Ningchao Jiang "Analysis on drought stress of Longjing tea seedlings based on slope fluorescence index", Proc. SPIE 12557, AOPC 2022: Optical Sensing, Imaging, and Display Technology, 125572N (23 January 2023); https://doi.org/10.1117/12.2652142

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Luminescence

Imaging systems

Light emitting diodes

Image processing

Cameras

Lamps

Image processing software

Show All Keywords

Keywords/Phrases

Search In:

Publication Years