Comparing potential of GA and 2, 4-D in increasing fruit yield from<i>Jatropha curcas</i>

Makwana, Vijay; Shukla, Purna; Robin, Pushpa

doi:10.5958/j.0976-3015.1.1.021

Cited by 4 publications

(5 citation statements)

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“…ethrel 2500 ppm was next to GA 3 100 ppm with a value of (93.91%) and number of inflorescence per plant from 9 th spray day to 14 th spray days found maximum in GA 3 50 ppm (31.25 and 97.39%) which followed by ethrel 2500 ppm (28.19 and 77.49%) and GA 3 100 (27.55 and 70.18%) respectively. Similar work GA at 50 and 100 ppm resulted in an increase in total number of flowers by 15% and 42 % respectively reported by Makwana et al (2010) with different concentration of GA 3 (10, 100 and 1000 ppm) in J. curcas. (Tewari, 2007) also reported similar work in inflorescence of J. curcas.…”

Section: Number Of Inflorescence Per Plantsupporting

confidence: 60%

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Effect of foliar application of GA3, ethrel and copper sulphate on flowering behaviour and sex ratio of Jatropha curcas L.

Gayakvad

Jadeja

Bhalawe

2014

JANS

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Effect of various plant growth substances viz., GA 3 (25, 50,100 ppm), ethrel (1500, 2000, 2500 ppm), copper sulphate (0.1, 0.2, 0.5%) as foliar spray treatment applied during January to October was studied at 15 days intervals. The flowering behaviour and sex-expression of Jatropha curcas was investigated during in randomized block design (RBD) at the College Farm, Navsari. Looking to the results, it was noticed that GA 3 50 ppm resulted in increased number of inflorescence per plant (31.25), number of flower per inflorescence (76.87), number of (male 94.75/female 4.01) flowers, flower sex ratio (24.22) in J. curcas. The Male: Female flower ratio was the lowest at 14 th spray stage under majority of treatments indicating increased number of female flowers which is ultimately reflected by increased fruit and seed yield of J. curcas.

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Section: Number Of Inflorescence Per Plantsupporting

confidence: 60%

“…The selected time of spray was early morning hours and spraying was initiated from the time foliar bud emerged. Each inflorescence received three sprays of equal volume of solution at an interval of 15 days (Makwana et al, 2010). Ethrel at three different concentrations 1500, 2000 and 2500 ppm were applied.…”

Section: Preparation Of Solution Of Growth Substancesmentioning

confidence: 99%

Effect of foliar application of GA3, ethrel and copper sulphate on flowering behaviour and sex ratio of Jatropha curcas L.

Gayakvad

Jadeja

Bhalawe

2014

JANS

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“…Hasil penelitian Makwana et al (2010a) memperlihatkan bahwa aplikasi GA3 konsentrasi 10-100 ppm mampu meningkatkan jumlah bunga betina tanaman jarak pagar. Aplikasi 2,4D konsentrasi 100 ppm juga mampu meningkatkan nisbah bunga betina/jantan, jumlah bunga betina dan jumlah bunga total (Makwana et al 2010b). Setiap varietas tanaman memerlukan konsentrasi ZPT tertentu untuk menghasilkan jumlah bunga yang optimum (Ishartati & Husen 2007).…”

Section: Perbaikan Peran Sinkunclassified

Sinkronisasi Source dan Sink untuk Peningkatan Produktivitas Biji pada Tanaman Jarak Pagar

Mastur

2016

Bul. Tan. Tembakau, Serat & Minyak Industri

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ABSTRAKSaat ini dunia sedang menghadapi masalah penurunan cadangan minyak dan dampak lingkungannya. Jarak pagar (Jatropha curcas L.) merupakan sumber bahan baku biodiesel yang potensial. Pengembangan jarak pagar saat ini masih terbatas disebabkan usaha tani yang belum menguntungkan terutama disebabkan produktivitas tanaman rendah. Makalah dimaksudkan untuk membahas pendekatan source dan sink untuk peningkatan produktivitas tanaman jarak pagar. Strategi penelitian untuk meningkatkan produktivitas dilakukan dengan peningkatan produksi biologi (biomassa) dan ekonomi (biji dan minyak). Produktivitas dapat meningkat jika terjadi sinergi antara source dan sink. Peningkatan source dapat dilakukan dengan meningkatkan kemampuan tanaman dalam memanen energi cahaya melalui peningkatan produksi asimilat dengan peningkatan laju fotosintesis daun individual, perbaikan arsitektur kanopi, serta memperpanjang umur produktif daun terutama selama pembentukan biji. Perbaikan sink dapat dilakukan dengan meningkatkan proporsi bunga betina, meningkatkan proporsi buah jadi, serta meningkatkan laju dan lama pembentukan biji melalui dukungan source. Perbaikan source dan sink tersebut dilakukan melalui pemilihan genotipe tanaman dengan sifat-sifat source dan sink optimal untuk dijadikan bahan perakitan varietas. Perbaikan teknologi budi daya dapat dilakukan dengan pengaturan jarak tanam yang tepat, pemangkasan, pemupukan, pengairan, dan penggunaan ZPT yang tepat baik untuk mendukung kanopi yang produktif sebagai pemasok asimilat, maupun untuk memperbesar kemampuan biji sebagai sink utama dalam memanfaatkan semaksimal mungkin pasokan asimilat untuk sintesis biji dan lemak. Dengan demikian, diharapkan diperoleh tanaman jarak pagar dengan produktivitas tinggi sebagai hasil dari produksi biomassa dan indeks panen tinggi.Kata kunci: Jarak pagar, Jatropha curcas L., biomassa, source, sink ABSTRACT Nowadays, the world is facing problem of lowering petroleum fuel stocks and its environmental impact. Physic nuts (Jatropha curcas L.) is a plant that can be used as biodiesel feedstock. Extention problem of physic nuts cropping area and its role as biodiesel source is still limited due to low economical value and low productivity. This paper elucidates source and sink and their correlation to productivity based on research. Research strategies are directed to study increase biological yield (biomass) and economical yield (seed and oil content) of physic nut. The yield can be increased by synergizing between source and sink. Alleviating source could be done by increasing the ability of plant in increasing photoshinthesis rate, arranging canopy architecture, and prolonging the age leaves especially during seed development. Sink process could be optimized through promoting number of female flower, number of seeds, and increasing seed initiation and development. The source and sink improvement can be implemented through genotype selection for breeding materials. Cultivation technology improvement can be conducted plant optimum spacing and population arra...

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“…Generally, short-day (SD) conditions increase the propensity for femaleness, while long-day (LD) conditions encourage maleness [ 13 , 14 ]. Despite these findings, the photoperiodic response mechanism governing sex differentiation in monoecious cucurbit plants remains elusive [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic analysis reveals the molecular basis of photoperiod-regulated sex differentiation in tropical pumpkins (Cucurbita moschata Duch.)

Xue,

Huang,

et al. 2024

BMC Plant Biol

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Background Photoperiod, or the length of the day, has a significant impact on the flowering and sex differentiation of photoperiod-sensitive crops. The “miben” pumpkin (the main type of Cucurbita moschata Duch.) is well-known for its high yield and strong disease resistance. However, its cultivation has been limited due to its sensitivity to photoperiod. This sensitivity imposes challenges on its widespread cultivation and may result in suboptimal yields in regions with specific daylength conditions. As a consequence, efforts are being made to explore potential strategies or breeding techniques to enhance its adaptability to a broader range of photoperiods, thus unlocking its full cultivation potential and further promoting its valuable traits in agriculture. Results This study aimed to identify photoperiod-insensitive germplasm exhibiting no difference in sex differentiation under different day-length conditions. The investigation involved a phenotypic analysis of photoperiod-sensitive (PPS) and photoperiod-insensitive (PPIS) pumpkin materials exposed to different day lengths, including long days (LDs) and short days (SDs). The results revealed that female flower differentiation was significantly inhibited in PPS_LD, while no differences were observed in the other three groups (PPS_SD, PPIS_LD, and PPIS_SD). Transcriptome analysis was carried out for these four groups to explore the main-effect genes of sex differentiation responsive to photoperiod. The main-effect gene subclusters were identified based on the principal component and hierarchical cluster analyses. Further, functional annotations and enrichment analysis revealed significant upregulation of photoreceptors (CmCRY1, F-box/kelch-repeat protein), circadian rhythm-related genes (CmGI, CmPRR9, etc.), and CONSTANS (CO) in PPS_LD. Conversely, a significant downregulation was observed in most Nuclear Factor Y (NF-Y) transcription factors. Regarding the gibberellic acid (GA) signal transduction pathway, positive regulators of GA signaling (CmSCL3, CmSCL13, and so forth) displayed higher expression levels, while the negative regulators of GA signaling, CmGAI, exhibited lower expression levels in PPS_LD. Notably, this effect was not observed in the synthetic pathway genes. Furthermore, genes associated with ethylene synthesis and signal transduction (CmACO3, CmACO1, CmERF118, CmERF118-like1,2, CmWIN1-like, and CmRAP2-7-like) showed significant downregulation. Conclusions This study offered a crucial theoretical and genetic basis for understanding how photoperiod influences the mechanism of female flower differentiation in pumpkins.

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Comparing potential of GA and 2, 4-D in increasing fruit yield fromJatropha curcas

Cited by 4 publications

References 0 publications

Effect of foliar application of GA3, ethrel and copper sulphate on flowering behaviour and sex ratio of Jatropha curcas L.

Effect of foliar application of GA3, ethrel and copper sulphate on flowering behaviour and sex ratio of Jatropha curcas L.

Sinkronisasi Source dan Sink untuk Peningkatan Produktivitas Biji pada Tanaman Jarak Pagar

Transcriptomic analysis reveals the molecular basis of photoperiod-regulated sex differentiation in tropical pumpkins (Cucurbita moschata Duch.)

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