Relative leaf expansion rate and other leaf-related indicators for detection of drought stress in chili pepper (Capsicum annuum L.).

Widuri, Laily Ilman; Lakitan, Benyamin; Hasmeda, Mery; Sodikin, Erizal; Wijaya, Andi; Meihana, Mei; Kartika, Kartika; Siaga, Erna

doi:10.21475/ajcs.17.11.12.pne800

Cited by 21 publications

(16 citation statements)

References 26 publications

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“…Analisis yang dilakukan adalah pengukuran tinggi tanaman dan lebar daun dilakukan secara kuantitatif menggunakan penggaris. Tinggi tanaman dihitung mulai dari titik pangkal batang sampai ujung daun tertinggi dari tanaman sedangkan pengukuran lebar daun dilakukan dengan menarik jarak antara garis daun terluar dari kedua sisi daun (Oktabriana, 2017;Widuri et al, 2017).…”

Section: Metode Analisisunclassified

Kualitas Mutu Sayur Kasepak (Kangkung, Selada, Dan Pakcoy) Dengan Sistem Budidaya Akuaponik Dan Hidroponik

Rahmadhani

Widuri

Dewanti

2020

J-AGT

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Aquaponic is considered one of alternative culture system to improve production and quality of leafy vegetables by combining soil less culture and fish farming. Utilization of fish manure contained in waste water provides nutrient sources for growing plants. Three kinds of leafy vegetables including water spinach (Ipomoea aquatica F.), green coral lettuce (Lactuca sativa L.), and bok choi (Brassica rapa L.) were grown using both aquaponic and hydroponic system at the Green House in Serut village, Panti District, Jember Regency, from April to June 2019. Productions of each leafy vegetable were evaluated on both culture systems. Water spinach represented 29.12% higher production in aquaponic than hydroponic system, shown by significant value in plant height, number of leaves, root volume, and leaf fresh weight. Otherwise, bok choi production displayed 17.03% increased in hydroponic than aquaponic system. However, leaf production of lettuce was not significant between hydroponic and aquaponic system. Lettuce production in aquaponic only 1.90% lowest than hydroponic system indicated that lettuce was appropriate to cultivate in both farming systems. Keywords: aquaculture, Brassica rapa L., leaf fresh weight, Ipomoea aquatica F., Lactuca sativa L., soil less culture

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Section: Metode Analisisunclassified

Kualitas Mutu Sayur Kasepak (Kangkung, Selada, Dan Pakcoy) Dengan Sistem Budidaya Akuaponik Dan Hidroponik

Rahmadhani

Widuri

Dewanti

2020

J-AGT

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“…Widuri et al (2017) as follows: ILD = 0.606 x P x L ILD: Index of leaf area (cm 2 ); P: leaf length; L: leaf width Defoliation is the percentage of leaves eaten by the insects. Defoliation was measured using the following formula: LDD = D x ILD LDD: Area of eaten leaves; D: Defoliation…”

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confidence: 99%

Insecticidal activity of culture filtrates from liquid medium of Beauveria bassiana isolates from South Sumatra (Indonesia) wetland soil against larvae of Spodoptera litura

2019

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Abstract. Ayudya DR, Herlinda S, Suwandi S. 2019. Insecticidal activity of culture filtrates from liquid medium of Beauveria bassiana isolates from South Sumatra (Indonesia) wetland soil against larvae of Spodoptera litura. Biodiversitas 20: 2101-2109. The obstacle in utilizing entomopathogenic fungi to control pest insects in wetlands is the inability of their isolates to survive during the saprophytic phase due to the soil being very acidic. Therefore, the exploration of fungi being able to survive in the acidic soil was utilized in the acidic ecosystem. This study aimed to test the toxic activity of Beauveria bassiana culture filtrates from liquid medium at pH 2.5 and 6 against Spodoptera litura larvae. Total of ten isolates collected from South Sumatra, Indonesia was grown in liquid media at pH of 2.5 and 6 for six weeks. The result showed that the culture filtrate from liquid medium at pH 6 was more toxic against the larvae than that at pH 2.5. The mortality of the larvae at pH 6 reached 92%, while that at pH 2.5 it reached 13.33% only. The findings of present study revealed that the culture filtrate isolates of BPdR, BJgTs, BSwTd2, BSwTd3, BSwTd4, BKKPp2 from pH 2.5 media still caused high larvae mortality (6.67-13.33%). These seven isolates are superior due to their toxic nature at pH 2.5. Consequently, present study has increased the chances of success in utilizing these isolates for biological control in acidic ecosystems, such as peatlands, tidal lowlands, and freshwater swamps.

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“…Only few had used zero intercept linear or polynomial regression in estimating leaf area (Lakitan et al 2017;Meihana et al 2017;Widuri et al 2017). Despite, leaf area estimation model had been developed as early as 1930's (Hopkins, 1939) or earlier; zero intercept regression or regression through the origin had only been used since 1980's (Lakitan, 1989) or perhaps a bit earlier.…”

Section: Justifying Zero Intercept Regression Modelsmentioning

confidence: 99%

Acclimating leaf celery plant (Apium graveolens) via bottom wet culture for increasing its adaptability to tropical riparian wetland ecosystem

et al. 2020

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Abstract. Lakitan B, Kartika, Susilawati, Wijaya A. 2021. Acclimating leaf celery plant (Apium graveolens) via bottom wet culture to increase its adaptability to the tropical riparian wetland ecosystem. Biodiversitas 22: 320-328. Bottom-wet culture was set up for acclimating leaf celery plant prior to cultivation at shallow water table conditions. The aim of this research was to evaluate adaptability of leaf celery plants to riparian wetland ecosystem. Leaf celery was selected as potential candidate since natural habitat of its wild relatives is marshlands. Shading at 0%, 20%, and 60% was applied to reduced tropical sunlight intensity. Results of this study indicated that soil moisture was significantly increased in plants exposed to 60% shading, but leaf SPAD value was not significantly affected. Leaf celery is a perennial vegetable that can be frequently harvested. Weekly harvesting was rewarded with optimum yield and good quality leaves, i.e. high SPAD value (45.73 to 51.89). Delaying harvest to 3 weeks increased total yield but 52.12% of the harvested leaves were non-marketable. Mother plant of leaf celery produced suckers, but number of suckers only moderately correlated with yield (R2 = 0.56). Plants exposed to 60% shading produced significantly less suckers (9.00) than those exposed to full sunlight (12.46) and 20% shading (12.88) Use of zero intercept linear regression model, with length of leaf midrib (LLM) x leaf wingspan (LWS) as predictor, resulted in a geometrically based and accurate leaf area estimation model (LA = 0.3431(LLM x LWS); R2 = 0.87) for compound leaves of leaf celery plant. In conclusion, the most crucial factor in optimizing quantity and quality of yield was weekly harvesting focusing on marketable-size leaves.

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Relative leaf expansion rate and other leaf-related indicators for detection of drought stress in chili pepper (Capsicum annuum L.).

Cited by 21 publications

References 26 publications

Kualitas Mutu Sayur Kasepak (Kangkung, Selada, Dan Pakcoy) Dengan Sistem Budidaya Akuaponik Dan Hidroponik

Kualitas Mutu Sayur Kasepak (Kangkung, Selada, Dan Pakcoy) Dengan Sistem Budidaya Akuaponik Dan Hidroponik

Insecticidal activity of culture filtrates from liquid medium of Beauveria bassiana isolates from South Sumatra (Indonesia) wetland soil against larvae of Spodoptera litura

Acclimating leaf celery plant (Apium graveolens) via bottom wet culture for increasing its adaptability to tropical riparian wetland ecosystem

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