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Non-destructive mathematical models to estimate leaf area in noni (Morinda citrifolia)

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Abstract

Noni is one of the most economically and medicinally important species of the family Rubiaceae grown in tropical countries. The leaf area (LA) estimation is important to understanding light interception, which regulates physiological processes such as respiration, transpiration, photosynthesis, nutrient usage and mobilisation. Elliptic to elliptic-ovate shaped noni leaves were observed in different sizes-small (surface area < 228 cm2), medium (228–346.4 cm2) and large (> 347 cm2). Reliable and accurate mathematical models for estimating the leaf area of noni were developed that were based on non-destructive measurements of midrib length (ML) and maximum leaf width (MW). A significant positive correlation between maximum width and midrib length r = 0.993 and S = 0.123 was observed. Maximum correlation coefficient (r = 0.999) and minimum standard error (S = 0.200) were observed in estimated leaf area based on maximum width and measured leaf area. This finding revealed that the estimated leaf area from maximum width is superior to the estimated leaf area with the help of midrib length. The developed models estimated the leaf area of small, medium, and large leaves of noni accurately. This non-destructive mathematical model is low in cost, accurate and fast to estimate leaf area for the understanding of light interception and management of nutrients for healthy plant growth and development.

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Acknowledgements

The work was supported by the University of Guyana and Fiji National University.

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Authors and Affiliations

  1. Department of Biology, Faculty of Natural Sciences, The University of Guyana, Georgetown, Guyana

    Ramwant Gupta

  2. Department of Biology, School of Pure Sciences, Fiji National University, Natabua Campus, Suva, Fiji

    Ravi Dutt Sharma

  3. Central Soil Salinity Research Institute, Regional Research Station (CSSRI-RRS), Lucknow, UP, India

    Chhedi Lal Verma

  4. Department of Department of Meteorology and Environmental Sciences, School of Applied Sciences, Fiji National University, Natabua Campus, Suva, Fiji

    Satya Narayan Shashtri

  5. Department of Botany, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, UP, India

    Ramwant Gupta

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  1. Ramwant Gupta
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  2. Ravi Dutt Sharma
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  3. Chhedi Lal Verma
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  4. Satya Narayan Shashtri
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Correspondence to Ramwant Gupta.

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Communicated by Bo Zheng.

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Gupta, R., Sharma, R.D., Verma, C.L. et al. Non-destructive mathematical models to estimate leaf area in noni (Morinda citrifolia). Acta Physiol Plant 45, 109 (2023). https://doi.org/10.1007/s11738-023-03585-w

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  • DOI: https://doi.org/10.1007/s11738-023-03585-w

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