230,780 research outputs found
Allium zhobicum Nazar Khan, Amir Sultan & R. M. Fritsch 2021, species nova
No full textAllium zhobicum Nazar Khan, Amir Sultan & R.M. Fritsch, species nova. Figs. 1-6, 17 Type: Balochistan, Zhob district, Qamardin Karez, Khutkandai, 31°31’31”N 68°14’38”E, Nazar Khan Mandokhel, 24 April, 2020 (RAW101342). Diagnosis: The shape of ovary is most similar to A. mirum Wendelbo, but this species has papery outer bulb tunics and up to 8cm broad, elliptical leaves, a campanulate perigonium, up to 3 cm long pedicels, and longer obovate tepals of brown purple colour. The violet upper parts of filaments are similar to those of A. hindukuschense Kamelin & Seisums, but A. zhobicum differs from A. hindukuschense by much broader and scarcely recurved tepals of lilac colour and with rounded apices, and spherical ovaries. Description: Bulbs 1.5-2.5 cm in diameter, globose; outer tunics initially light brown, delicate and fragile but coriaceous and brown when dry; inner tunics membranous, white. Scape 10-30 cm long, cylindrical, glabrous, green to yellowish green. Leaves 1-3, longer than scape, linear, 5-10 (18) mm broad, margins entire towards apex and papillate towards base. Spathe membranous, up to 1 cm with brownish nerves, splitting into 3 lobes longitudinally to obliquely. Umbel hemispherical, dense. Pedicels unequal, 10-20 mm long, green to purple. Perigonium stellate, tepals whitish lilac to lilac with violet to purple nerve, 6-7 mm long and 1.5-1.8 mm broad, elliptical-linear to oblong, recurved, obtuse to acute, outer tepals broader at base than inner ones. Filaments narrow triangular, at base connate and adnate to tepals, shorter to slightly longer than tepals, violet at apex becoming creamy toward base; inner filaments slightly broader at base than outer ones. Anthers 1-2 mm, violet to brownish, dorsifixed. Ovary green, six lobed depressed-globose; style 3-6 mm, filiform, exserted; stigma violet. Capsule triangular, greenish white, olive green at angle; seeds black, 2-3 mm long, irregularly shaped to ovate and D-shaped. Plants growing on sandy clay to sandy loamy soil near Chukhan have longer scapes, larger leaves, and lax flowers with pinkish-lilac tepals. Vernacular name: Khatol. Etymology: The species is named after the Zhob district. Distribution: Found in several localities in Zhob district (Chukhan, Larai, Khutkandai, Qamardin Karez) along the border to Afghanistan. Ecology: Usually found growing in sandy loam. Ethnobotany: The whole plant is edible. Especially the bulbs are collected in large amounts by the local population and are eaten raw. The species might become threatened by over-collecting in the future. The flowers are also eaten by goats and sheep. Additional specimens examined: Balochistan, Zhob district, Chukan, 31°15’39”N 68°52’40”E, 2017 m asl, Nazar Khan Mandokhel, 23 April, 2020 (RAW 101348). The new species belongs to A. subg. Melanocrommyum (Webb & Berthel.) Rouy sect. Thaumasioprason Wendelbo.Published as part of Khan, Nazar, Fritsch, R. M., Sultan, Amir & Khan, Tahir, 2021, ALLIUM (AMARYLLIDACEAE) SPECIES IN PAKISTAN: TWO NEW RECORDS AND A NEW SPECIES FROM ZHOB (BALOCHISTAN), pp. 1-7 in Pakistan Journal of Botany 53 (5) on pages 1-2, DOI: 10.30848/PJB2021-5(1), http://zenodo.org/record/467987
Editorial: Ethylene: A Key Regulatory Molecule in Plants
Full text linkEthylene is a simple gaseous phytohormone with multiple roles in regulation of metabolism at cellular, molecular, and whole plant level (Pierik et al., 2006; Lin et al., 2009; Schaller, 2012; Khan N. A. and Khan M. I. R., 2014). It influences performance of plants under optimal and stressful environments by interacting with other signaling molecules (Müller and Munné-Bosch, 2015; Thao et al., 2015). The action of ethylene depends on its concentration in cell and the sensitivity of plants to the hormone (Pierik et al., 2006; Habben et al., 2014; Arraes et al., 2015; Sun et al., 2016). In recent years, research on ethylene has been focused due to its dual action on the regulation of plant processes at physiological and molecular level. The aim of the current research topic was to explore and update our understanding on its regulatory role of ethylene in plant developmental mechanisms at cellular or whole plant level under optimal and changing environmental conditions. The present edited volume includes original research papers and reviews articles describing ethylene’s regulatory role in plant development during plant ontogeny and how it interacts with biotic and abiotic stress factors. For better understanding of the articles included in this volume, papers have been grouped into three categories
The A. Q. Khan network causes and implications
Full text linkThe A. Q. Khan nuclear supplier network constitutes the most severe loss of control over nuclear technology ever. For the first time in history all of the keys to a nuclear weapon*the supplier networks, the material, the enrichment technology, and the warhead designs--were outside of state oversight and control. This thesis demonstrates that Khan's nuclear enterprise evolved out of a portion of the Pakistani procurement network of the 1970s and 1980s. It presents new information on how the Pakistani state organized, managed, and oversaw its nuclear weapons laboratories. This thesis provides extensive documentation of command and control challenges faced by Pakistan and argues that Khan was largely a rogue actor outside of state oversight. The A. Q. Khan affair refutes more optimistic theories about the effects of nuclear proliferation. This case study indicates that states have a difficult time balancing an abstract notion of safety against pressing needs for organizational speed and flexibility. This thesis enumerates enabling institutional factors in Pakistan, which allowed Khan's enterprise to continue and flourish, and which might also be generalizable to other states of proliferation concern.Approved for public release; distribution is unlimited.http://archive.org/details/theaqkhnetworkca10945183
Location of seven sampling sites for <i>R</i>. <i>ferrugineus</i> field populations in Punjab and KPK, Pakistan 1: Bahawalpur; 2: Rahim Yar Khan; 3: Vehari; 4: Dera Ghazi Khan; 5: Muzaffargarh; 6: Layyah; 7: Dera Ismail Khan.
No full textLocation of seven sampling sites for R. ferrugineus field populations in Punjab and KPK, Pakistan 1: Bahawalpur; 2: Rahim Yar Khan; 3: Vehari; 4: Dera Ghazi Khan; 5: Muzaffargarh; 6: Layyah; 7: Dera Ismail Khan.</p
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Graduate Research Fellowship Program (GRFP): Ali Yar Khan
No full textData management plan for the grant, "Graduate Research Fellowship Program (GRFP)" for Ali Yar Khan
An extension of a theorem of Sahab, Khan, and Sessa
Full text linkA fixed point theorem of Fisher and Sessa is generalized to locally convex spaces and the new result is applied to extend a recent theorem on invariant approximation of Sahab, Khan, and
Sessa
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