Determination of proline content and NPK resorption of mangrove leaves as adaptive bioindicators of environmental change

• Main Authors: Prihastanti, Erma, Hastuti, Endah Dwi, Setiari, Nintya, Haryati, Sri
• Format: Conference Proceeding
• Language: English
• Subjects: Biomonitoring; Land use; Nutrients; Ponds; Proline; Tracking stations
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0140268

Mangroves are species that live in high salinity environments. Mangrove forests have experienced land-use experts into pond areas and tracking areas. Changes in the mangrove growing environment affect the vegetative and generative growth processes of mangroves. Mangrove adaptations include the resorption of N, P, K and proline. The purpose of this study was to determine the differences in the resorption of NPK and proline produced by mangrove species in different environments. The research method was carried out by analyzing the NPK content in mature mangrove leaves and senescence to find the resorption value. Proline analysis was carried out on mangrove leaves. Observations were made in Karimun Jawa on three different islands; Menjangan Island, Kemujan Island, and Tracking Kemujan Island. The results of proline analysis showed that the proline content of A.marina and R.stylose species on Menjangan Island was 1.56 ± 0.53 ppm and 1.39 ± 0.42 ppm, respectively. The content of proline in the pond island of Kemujan Island in C. tagal 1.30 ppm ± 1.29 ppm, R. apiculata 2.29 ± 0.28, E.agallocha 5.46 ± 3.25 ppm and R.stylosa 3.55 ± 1.36 ppm. The content of proline in the mangrove tracking station at C. tagal was 0.79 ± 0.68 ppm, R. apiculata 2.78 ± 0.23 ppm, R.stylosa 3.55 ± 1.36 ppm, and L.racemosa 3.24 ppm. Resorption of N, P, and K varies in each environment. The resorption of N, P, K was relatively higher at the tracking mangrove location than the resorption of mangrove leaves that grew on Menjangan Island and Kemujan Island. This shows that in the mangrove tracking area, plants can carry out a mechanism for absorbing nutrients from senescent leaves to be reused in their metabolism.