Growth Response of Seedlings of Four Robusta Coffee (Coffea canephora Pierre. Ex. A. Froehner) Clones to Drought Stress

Erdiansyah, Novie Pranata; Wachjar, Ade; Sulistyono, Eko; Supijatno, Supijatno

doi:10.22302/iccri.jur.pelitaperkebunan.v35i1.344

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…Bahan tanam unggul yang mempunyai daya adaptasi luas dapat menunjang peningkatan produksi kopi nasional. Untuk menemukan varietas kopi yang mempunyai adaptasi luas, salah satu karakter yang dapat diamati adalah akar tanaman (Kakanga et al 2017;Erdiansyah et al 2019).…”

Section: Pendahuluanunclassified

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Karakter Perakaran Sejumlah Varietas Kopi Arabika pada Fase Bibit di Pesemaian

Wibowo

2021

Agrotechnology Res J

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Roots represent the fundamental structure and material transport systems in plants. These important organs are used to study the adaptation processes in the environment. During the nursery stage, root evaluation serves as determining the seedling quality before transplant. This research aims to ascertain the root characteristics of several Arabica coffee varieties for a suitably vigorous root nursery system. Kaliwining Experimental Garden, Jember, Indonesia, served as the research location. The method used was a completely randomized design with a single factor, including arabica coffee varieties (Abesinia-3, Andungsari-1, BLP-4, Gayo-1, K-08, K-29, K-34, K-79, K-130, Kartika-1, Kayumas and Sigararutang). The result showed that the differences in the various sample factors significantly influenced the root properties. In addition, the entire observation parameters demonstrated a positive correlation except for the root and shoot ratio. Furthermore, BLP-4 v obtained the maximum values for plant height, stem diameter, fresh dry weight of taproot, and root biomass, while Gayo-1 variety observed the greatest number of leaves. Also, the Sigararutang variety indicated the highest value of the fresh and dry weight of shoot, fresh weight of lateral roots, and root length, while Kayumas and K-34 varieties acquired the lowest values of plant height, fresh and dry weight of shoot and root, as well as root length. Therefore, BLP-4, Gayo-1, and Sigararutang varieties exhibited the potentials of broader adaptability.

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Section: Pendahuluanunclassified

“…Sistem perakaran yang kuat menjadi kriteria utama dalam melakukan seleksi tanaman untuk daerah adaptasi yang luas. Pengujian karakter akar juga dilakukan oleh Gichimu et al (2014) dan Erdiansyah et al (2019) pada pembibitan kopi untuk mengetahui karakter akar kopi yang dapat beradaptasi terhadap cekaman kekeringan.…”

Section: Perakaran Kopi Arabika Fase Bibitunclassified

Karakter Perakaran Sejumlah Varietas Kopi Arabika pada Fase Bibit di Pesemaian

Wibowo

2021

Agrotechnology Res J

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An Approach to Solve Some Unsolved Limitations: Rough Set Theory

Mukherjee,

Ghosh

2023

Journal of Mathematical Sciences & Computational Mathematic

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Rough set theory is a mathematical approach to dealing with uncertainty and vagueness in data. It was introduced as a way to approximate classical sets using lower and upper bounds. Rough set theory has been applied to various domains such as data mining, knowledge discovery, machine learning, soft computing, medical analysis, synthesis of switching circuits, and civil engineering. Rough set theory can handle imprecise and noisy data by finding structural relationships and dependencies among attributes. It can also reduce redundant and irrelevant attributes and generate decision rules from data. Rough set theory is closely related to fuzzy set theory, but differs in that it uses multiple memberships instead of partial memberships to model uncertainty. Lot of research works have taken place in this domain with many fruitful outcomes that helped lot in expanding this field to much wider reach of knowledge irrespective of the domain concerned to mathematical and technological application development. In lieu of such research-oriented progress in different versatile domain, many areas of research has remained untouched as many a problem remained unsolved being shrouded under the mystery. This paper deals mainly with some of the still unsolved questions on Rough Set that are under study for new discovery and a way to overcome such limitations citing proper techniques, examples, working models, and graphs.

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Contrasted agronomical and physiological responses of five Coffea arabica genotypes under soil water deficit in field conditions

Sarzynski,

Vaast,

Rigal

et al. 2024

Front. Plant Sci.

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IntroductionBreeding programs have developed high-yielding Coffea arabica F1-hybrids as an adaptation against adverse conditions associated with climate change. However, theresponse to drought of coffee F1 hybrids has seldom been assessed.MethodsA trial was established with five C. arabica genotypes (2 pure lines: Catimor and Marsellesa and 3 F1 hybrids: Starmaya, Centroamericano and Mundo Maya) planted under the leguminous tree species Leuceana leucocephala. Coffee growth, yield and physiological responses were assessed under a rain-fed (control: CON) and a rainfall reduction treatment (RR) for 2 years.ResultsThe RR treatment created a long-term rainfall deficit in a region with suboptimal temperature similar to those predicted by climate change scenarios. Moreover, the RR treatment reduced soil water content by 14% over 2 successive years of production and increased hydric stress of the three F1-hybrids (leaf water potentials averaged -0.8 MPa under RR compared with -0.4 MPa under CON). Under RR, coffee yields were reduced from 16 to 75% compared to CON. Mundo Maya F1 hybrid was the sole high-yielding genotype apable of sustaining its yield under RR conditions. Our results suggested that its significant increase in fine root density (CON = 300 and RR = 910 root.m-2) and its maintenance of photosynthetic rate (2.5 – 3.5 mmol CO2 m-2 s-1) at high evaporative demand might explain why this genotype maintained high yield under RR condition.DiscussionThis work highlights a possible drought tolerance mechanism in fruit bearing adult coffee trees where the plant fine root number increases to intake more water in order to preserve turgor and sustainphotosynthesis at high ETo and therefore conserves high yield in dry conditions.

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Growth Response of Seedlings of Four Robusta Coffee (Coffea canephora Pierre. Ex. A. Froehner) Clones to Drought Stress

Cited by 3 publications

References 6 publications

Karakter Perakaran Sejumlah Varietas Kopi Arabika pada Fase Bibit di Pesemaian

Karakter Perakaran Sejumlah Varietas Kopi Arabika pada Fase Bibit di Pesemaian

An Approach to Solve Some Unsolved Limitations: Rough Set Theory

Contrasted agronomical and physiological responses of five Coffea arabica genotypes under soil water deficit in field conditions

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