Seed Germination Studies in Musa. Ii. Alternating Temperature Requirement for the Germination of Musa Balbisiana

Stotzky, G.; Cox, Elsie A.

doi:10.1002/j.1537-2197.1962.tb15007.x

Cited by 16 publications

(16 citation statements)

References 17 publications

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“…For instance, several studies demonstrate desiccation sensitivity where seeds lose viability at 6% MC [ 46 ] or, for extracted embryos, to 10–15%MC [ 50 , 51 , 67 ]. Other studies found that seeds tolerate drying, but do not state to what moisture content [ 47 , 48 ].…”

Section: Discussionmentioning

confidence: 99%

“…For wild species, and especially banana CWRs, critical knowledge gaps exist in how best to collect, store and germinate their seeds. For Musa , only six species have been assessed for their storage behaviour, results of which are inconclusive [ 46 , 47 , 48 , 49 , 50 , 51 , 52 ]. Additionally, germination of seeds is notoriously inconsistent and dormancy poorly understood [ 53 , 54 , 55 ].…”

Section: Introductionmentioning

confidence: 99%

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Challenges for Ex Situ Conservation of Wild Bananas: Seeds Collected in Papua New Guinea Have Variable Levels of Desiccation Tolerance

Kallow

Longin

Sleziak³

et al. 2020

Plants

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Ex situ seed conservation of banana crop wild relatives (Musa spp. L.), is constrained by critical knowledge gaps in their storage and germination behaviour. Additionally, challenges in collecting seeds from wild populations impact the quality of seed collections. It is, therefore, crucial to evaluate the viability of seeds from such collecting missions in order to improve the value of future seed collections. We evaluate the seed viability of 37 accessions of seven Musa species, collected from wild populations in Papua New Guinea, during two collecting missions. Seeds from one mission had already been stored in conventional storage (dried for four months at 15% relative humidity, 20 °C and stored for two months at 15% relative humdity, −20 °C), so a post-storage test was carried out. Seeds from the second mission were assessed freshly extracted and following desiccation. We used embryo rescue techniques to overcome the barrier of germinating in vivo Musa seeds. Seeds from the first mission had low viability (19 ± 27% mean and standard deviation) after storage for two months at 15% relative humidity and −20 °C. Musa balbisiana Colla seeds had significantly higher post-storage germination than other species (p < 0.01). Desiccation reduced germination of the seeds from the second collecting mission, from 84 ± 22% (at 16.7 ± 2.4% moisture content) to 36 ± 30% (at 2.4 ± 0.8% moisture content). There was considerable variation between and (to a lesser extent) within accessions, a proportion of individual seeds of all but one species (Musa ingens N.W.Simmonds) survived desiccation and sub-zero temperature storage. We identified that seeds from the basal end of the infructescence were less likely to be viable after storage (p < 0.001); and made morphological observations that identify seeds and infructescences with higher viability in relation to their developmental maturity. We highlight the need for research into seed eco-physiology of crop wild relatives in order to improve future collecting missions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Challenges for Ex Situ Conservation of Wild Bananas: Seeds Collected in Papua New Guinea Have Variable Levels of Desiccation Tolerance

Kallow

Longin

Sleziak³

et al. 2020

Plants

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“…Pant et al [28] observed that when seeds of Cassia tora were incubated under normal room temperature they exhibited 92% germination but when exposed to 40, 50 and 60°C continuously for 10 d the germination percentage decreased to 85, 63 and 32%, respectively. Several earlier investigators have suggested that HT may be necessary for adequate release of energy for germination and growth [29][30][31], but it can also reduce plant emergence.…”

Section: Plant Responses To High Temperature 21 Seed Germination Anmentioning

confidence: 99%

Extreme Temperature Responses, Oxidative Stress and Antioxidant Defense in Plants

Hasanuzzaman¹,

Nahar²,

Fujita³

2013

Abiotic Stress - Plant Responses and Applications in Agriculture

192

174

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“…Although mechanical scarification has been shown to enhance germination of Musa (Musaceae) seeds under suboptimal conditions (Stotzky et al 1962), and the seed coat reported to be impermeable to water (e.g. Bhat et al 1994), the seed coat, in fact, is not water‐impermeable (Stotzky & Cox 1962). Furthermore, a water‐impermeable layer of palisade cells (see following section) is not present in the Musaceae (Humphrey 1896; Graven et al 1996).…”

Section: Taxonomic Occurence Of Physical Dormancymentioning

confidence: 99%

Taxonomy, anatomy and evolution of physical dormancy in seeds

Baskin

2000

Plant Species Biology

493

444

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Physical dormancy (PY) is caused by a water-impermeable seed or fruit coat. It is known, or highly suspected, to occur in nine orders and 15 families of angiosperms (sensu Angiosperm Phylogeny Group 1998), 13 of which are core eudicots. The Zingiberales is the only monocot order, and Cannaceae (Canna) the only monocot family, in which PY is known to occur. Six of the nine orders, and 12 of the 15 families, in which PY occurs are rosids. Furthermore, six of the families belong to the Malvales. The water-impermeable palisade layer(s) of cells are located in the seed coats of 13 of the families, and in the fruit coats of Anacardiaceae and Nelumbonaceae. In all 15 families, a specialized structure is associated with the water-impermeable layer(s). The breaking of PY involves disruption or dislodgment of these structures, which act as environmental 'signal detectors' for germination. Representatives of the nine angiosperm orders in which PY occurs had evolved by the late Cretaceous or early Tertiary (Paleogene). Anatomical evidence for PY in fruits of the extinct species Rhus rooseae (Anacardiaceae, middle Eocene) suggests that PY had evolved by 43 Ma, and probably much earlier. We have constructed a conceptual model for the evolution of PY, and of PY+ physiological dormancy (PD), within Anacardiaceae. The model begins in pre-Eocene times with an ancestral species that has large, pachychalazal, non-dormant (ND), recalcitrant seeds. By the middle Eocene, a derived species with relatively small, partial pachychalazal, orthodox seeds and a water-impermeable endocarp (thus PY) had evolved, and by the Oligocene, PD had been added to the seed (true seed + endocarp) dormancy mechanism. It is suggested that climatic drying (Eocene), followed by climatic cooling (Eocene-Oligocene transition), were the primary selective agents in the development of PY. An evolutionary connection between PY and recalcitrance is suggested by the relatively high concentration of these two character states in the rosids. Phylogenetic data and fossil evidence seem to support the PY AE (PY + PD) evolutionary sequence in Anacardiaceae, which also may have occured in Leguminosae.

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Seed Germination Studies in Musa. Ii. Alternating Temperature Requirement for the Germination of Musa Balbisiana

Cited by 16 publications

References 17 publications

Challenges for Ex Situ Conservation of Wild Bananas: Seeds Collected in Papua New Guinea Have Variable Levels of Desiccation Tolerance

Challenges for Ex Situ Conservation of Wild Bananas: Seeds Collected in Papua New Guinea Have Variable Levels of Desiccation Tolerance

Extreme Temperature Responses, Oxidative Stress and Antioxidant Defense in Plants

Taxonomy, anatomy and evolution of physical dormancy in seeds

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