VEGETOS: An International Journal of Plant Research & Biotechnology
(Society For Plant Research)

Research Articles


Volume: 32, Issue: 4, December 2019

Print ISSN : 0970-4078.
Online ISSN : 2229-4473.
Pub Email:
Page Visits: 70

Doi: 10.1007/s42535-019-00062-z
Doi Link:
First Page: 473
Last Page: 485
Published: 24 September, 2019

Photosynthetic efficiency in Gymnema sylvestre (Retz.) R.Br. genotypes


Leaves of Gymnema sylvestre (Retz.) R.Br. ex SCHULT plants are used to cure the most prevalent and important life style disease, the diabetes mellitus. Gymnema is a slow growing plant genotype with the requirement of higher photosynthetic rate. Presently, there is no report available on gaseous exchange and chlorophyll fluorescence parameters in gymnema. Total 44 genotypes were evaluated for their physiological efficiencies during post rainy season in sub-tropical region of Gujarat.The light curve studies indicated the light requirement of the plants to be between 1000 and 1250 µ mol (photons) m−2 s−1. Genotypes were categorized into low, medium and high groups considering over all mean values of different parameters ± standard deviation. Seven genotypes showed higher photosynthetic rate (PN), nine genotypes showed higher stomatal conductance (gs), six genotype exhibited higher transpiration rate (E), five genotypes revealed higher intrinsic water use efficiency (WUEint), eight genotypes manifested maximum photochemical efficiency (Fv/Fm), seven genotypes reached maximum actual efficiency of PSII (({ ext{F}}_{ ext{v}}^{{prime }})/({ ext{F}}_{ ext{m}}^{{prime }})), six genotype showed maximum quantum yield of PSII (ɸPSII) and electron transport rate (ETR) and seven genotypes exhibited higher open PS II centers (qP). The correlation matrix revealed that the PN was strongly positively correlated with gs, ({ ext{F}}_{ ext{v}}^{{prime }})/({ ext{F}}_{ ext{m}}^{{prime }}), ΦPSII and ETR. DGS-2 and DGS-18 were physiologically most efficient genotypes having high values in seven common parameters. These parameters were PN, gs, Fv/Fm, ({ ext{F}}_{ ext{v}}^{{prime }})/({ ext{F}}_{ ext{m}}^{{prime }}), ΦPSII, qP and ETR will be very useful in crop improvement program focused on biomass maximization in Gymnema sylvestre.



Chlorophyll fluorescence, n Gymnema sylvestren , Maximum efficiency of photosynthesis, Stomatal conductance, Water use efficiency


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Acknowledgements :

Authors are grateful to the Indian Council of Agricultural Research, New Delhi and the Director, ICAR-DMAPR, Anand for providing all basic facilities and the Gujarat State Biotechnology Mission, Government of Gujarat, India for funding assistance. We are also thankful to the germplasm collectors and curators of the germplasm used in this study.

Author Information:

Kuldeepsingh A. Kalariya
ICAR-Directorate of Medicinal and Aromatic Plants Research, Anand, India
Dipal Minipara
ICAR-Directorate of Medicinal and Aromatic Plants Research, Anand, India

Parmeshwar Lal Saran
ICAR-Directorate of Medicinal and Aromatic Plants Research, Anand, India

Lipi Poojara
ICAR-Directorate of Medicinal and Aromatic Plants Research, Anand, India

A. C. Polireddy
ICAR-Directorate of Medicinal and Aromatic Plants Research, Anand, India

P. Manivel
ICAR-Directorate of Medicinal and Aromatic Plants Research, Anand, India

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