International Journal of Advance Agricultural Research
ISSN: 2053-1265
Vol. 7(6), pp. 128-137, October 2019
doi.org/10.33500/ijaar.2019.07.010



Impact of water deficit on morpho-physiological parameters of young roselle plants (Hibiscus sabdariffa var sabdariffa)

Koné Dramane1*, Kouadio Oi Kouadio Samuel2, Tuo Seydou3, N’choAchi Laurent1,
N’GuessanAffoué Sylvie Rachelle4 and Kouakou Tanoh Hilaire1

1Université Nangui Abrogoua, UFR des Sciences de la Nature, 02 BP 801 Abidjan 02, Côte d’Ivoire.
2Université Peleforo Gon Coulibaly, UFR Sciences Biologiques, BP 1328 Korhogo, Côte d’Ivoire.
3Université Félix Houphouët Boigny, UFR Biosciences,22 BP 582 Abidjan 22, Côte d’Ivoire.
4Université Jean Lorougnon Guédé, UFR Agroforesterie, BP 150 Daloa, Côte d’Ivoire.

*To whom correspondence should be addressed. E-mail: konedracool@yahoo.fr.

Received 22 July, 2019; Received in revised form 29 August, 2019; Accepted 04 September, 2019.

Abstract


Keywords:
Hibiscus sabdariffa, Roselle, Water deficit, Morpho-physiological parameters, Field capacity.


Roselle (Hibiscus sabdariffa) is a tropical plant that is rich in nutrient reserves and has medicinal properties. Its culture provides substantial populations. However, the rarity of the rains due to climate change has a negative influence on the roselle culture. A control of the water supply of the plant is therefore a necessity for its development control. For this purpose, the morpho-physiological parameters of 18 to 30-day-old roselle seedlings subjected to moisture regimes of between 12.5 and 100% of field capacity were evaluated. The results indicate that seedling growth is significantly slowed when the moisture regime is between 12.5 and 25% of field capacity. Regarding the physiological parameters, the results show that the decline in the growth of the roselle is accompanied by a very strong production of phenolic compounds and proline. The hyper secretion of these compounds could be an adaptation reaction to water stress. However, for moisture regimes greater than 50% of the field capacity, plant growth is more active with low production of phenolic compounds and proline. Plants with a water regime of 80% of field capacity exhibited the best morpho-physiological parameters. This water quantity was retained for the optimal cultivation of roselle seedlings.

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