Flower Sex Expression in Cucurbit Crops of Kerala: Implications for Pollination and Fruitset

Anusree, T.; Abhina, C.; Lishiba, P. P.; Rasna, T. V.; Varma, Sangeetha; Sinu, Palatty Allesh

doi:10.18520/v109/i12/2299-2302

Cited by 3 publications

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“…We found that ants occupied more than 75% of the owers during the early hours of anthesis in different elds. The ratio of staminate owers to pistillate owers counted in our study agrees that the number of staminate owers is mostly higher in a eld 25,33,34 . As the nectar amount varies between the staminate and pistillate owers, this might be a major determinant of ant infestation of owers.…”

Section: Discussionsupporting

confidence: 89%

Native and Invasive Ants Affect Floral Visits of Pollinating Honey Bees in Pumpkin Flowers (Cucurbita Maxima)

Unni

Mir

Rajesh

et al. 2020

Preprint

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Global pollinator decline is a major concern. Several factors – climate change, land-use change, the decline of flowers, pesticide use, invasive species – have been suggested as the reasons. The effect of ants on flowers, despite being a potential reason, received less attention. The consequences of ants being attracted to nectar sources in plants vary depending upon factors like the position of the nectar source, the identity of ants, and other mutualists interacting with the plants. We studied the interaction between floral ants and pollinators in Cucurbita maxima and compared the competition exerted by native and invasive ants on the pollinator with the hypothesis that the invasive ants exacerbate more interference competition for pollinators than native ants. The pollinator’s choice, visitation rate and time spent/visit were assessed. Regardless of species and nativity ants negatively influenced all the pollinator visitation traits, such as visitation rate and duration spent on flowers. The invasive ants exerted a higher interference competition on the pollinators than native ants did. Ants despite performing pollination in flowers with generalist pollination syndrome, can be a threat for plant-pollinator mutualism in specialists like monoecious plants. A better understanding of factors influencing pollination will help in implementing better management practices.

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Section: Discussionsupporting

confidence: 89%

Native and Invasive Ants Affect Floral Visits of Pollinating Honey Bees in Pumpkin Flowers (Cucurbita Maxima)

Unni

Mir

Rajesh

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…We found that ants occupied more than 75% of the flowers during the early hours of anthesis in different fields. The ratio of staminate flowers to pistillate flowers counted in our study agrees that the number of staminate flowers is mostly higher in a field 37 , 41 , 42 . The ants preferred pistillate flowers over staminate flowers for foraging nectar, although they were less in field populations.…”

Section: Discussionsupporting

confidence: 89%

Native and invasive ants affect floral visits of pollinating honey bees in pumpkin flowers (Cucurbita maxima)

Unni

Mir

Rajesh

et al. 2021

Sci Rep

Self Cite

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Global pollinator decline is a major concern. Several factors—climate change, land-use change, the reduction of flowers, pesticide use, and invasive species—have been suggested as the reasons. Despite being a potential reason, the effect of ants on flowers received less attention. The consequences of ants being attracted to nectar sources in plants vary depending upon factors like the nectar source's position, ants' identity, and other mutualists interacting with the plants. We studied the interaction between flower-visiting ants and pollinators in Cucurbita maxima and compared the competition exerted by native and invasive ants on its pollinators to examine the hypothesis that the invasive ants exacerbate more interference competition to pollinators than the native ants. We assessed the pollinator's choice, visitation rate, and time spent/visit on the flowers. Regardless of species and nativity, ants negatively influenced all the pollinator visitation traits, such as visitation rate and duration spent on flowers. The invasive ants exerted a higher interference competition on the pollinators than the native ants did. Despite performing pollination in flowers with generalist pollination syndrome, ants can threaten plant-pollinator mutualism in specialist plants like monoecious plants. A better understanding of factors influencing pollination will help in implementing better management practices.

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“…Secara keseluruhan nisbah jumlah bunga jantan pada bunga betina adalah 18:1. Lebih banyaknya bunga jantan daripada bunga betina juga dilaporkan pada anggota Cucurbitaceae lainnya (Anusree et al 2015). Nisbah bunga jantan dan bunga betina yang hampir sama (19:1) dilaporkan pada pare (Momordica charantia L.) (Deyto & Cervancia 2009) dan pada melon (Cucumis melo L.) (Revanasidda & Belavadi 2019).…”

Section: Hasil Dan Pembahasan Fenologi Pembungaanunclassified

Foraging Behaviour and Pollination Efficiency of Heterotrigona itama (Cockerell) and Tetragonula laeviceps (Smith) (Hymenoptera: Apidae) on Chayote

Ayunin

Rauf

Harahap

2019

JIPI

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ABSTRAK Lebah tak bersengat merupakan serangga penyerbuk utama pada labu siam di daerah neotropika. Di Indonesia, informasi tentang penyerbukan pada labu siam belum tersedia. Penelitian ini bertujuan untuk mempelajari fenologi pembungaan labu siam, peran Heterotrigona itama (Cockerell), dan Tetragonula laeviceps (Smith) (Hymenoptera: Apidae) dalam penyerbukan labu siam. Pengamatan meliputi banyaknya bunga jantan dan bunga betina, volume nektar, konsentrasi gula nektar, durasi, dan laju kunjungan, serta persentase buah terbentuk. Tanaman labu siam menghasilkan bunga jantan lebih banyak dibandingkan bunga betina dengan nisbah 18:1. Tidak ada perbedaan volume nektar dan konsentrasi gula pada bunga jantan dan bunga betina. H. itama dan T. laeviceps yang mengunjungi kedua tipe bunga, dengan puncak kunjungan harian terjadi pada pukul 08:3010:30 WIB. Terdapat perbedaan yang signifikan pada durasi dan laju kunjungan antara H. itama dan T. laeviceps. Muatan polen H. itama (2137,50±184,49 butir) lebih tinggi dibandingkan dengan T. laeviceps (1675,00±110,47 butir). H. itama memindahkan polen ke stigma (14,1±4,1 butir) lebih banyak dibandingkan T.laeviceps (9,8±3,1 butir). Bunga betina yang tidak dikunjungi serangga gagal membentuk buah. Kunjungan tunggal H. itama dan T. laeviceps pada bunga labu siam menghasilkan persentase buah terbentuk berturut-turut sebesar 60 dan 40%. Persentase buah terbentuk lebih tinggi 8085% pada perlakuan penyerbukan terbuka yang mengindikasikan bahwa kunjungan yang berulang kali dapat meningkatkan peluang keberhasilan penyerbukan.

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Flower Sex Expression in Cucurbit Crops of Kerala: Implications for Pollination and Fruitset

Cited by 3 publications

References 0 publications

Native and Invasive Ants Affect Floral Visits of Pollinating Honey Bees in Pumpkin Flowers (Cucurbita Maxima)

Native and Invasive Ants Affect Floral Visits of Pollinating Honey Bees in Pumpkin Flowers (Cucurbita Maxima)

Native and invasive ants affect floral visits of pollinating honey bees in pumpkin flowers (Cucurbita maxima)

Foraging Behaviour and Pollination Efficiency of Heterotrigona itama (Cockerell) and Tetragonula laeviceps (Smith) (Hymenoptera: Apidae) on Chayote

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